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23871results about "Tubular articles" patented technology

Free-standing and aligned carbon nanotubes and synthesis thereof

One or more highly-oriented, multi-walled carbon nanotubes are grown on an outer surface of a substrate initially disposed with a catalyst film or catalyst nano-dot by plasma enhanced hot filament chemical vapor deposition of a carbon source gas and a catalyst gas at temperatures between 300° C. and 3000° C. The carbon nanotubes range from 4 to 500 nm in diameter and 0.1 to 50 μm in length depending on growth conditions. Carbon nanotube density can exceed 104 nanotubes / mm2. Acetylene is used as the carbon source gas, and ammonia is used as the catalyst gas. Plasma intensity, carbon source gas to catalyst gas ratio and their flow rates, catalyst film thickness, and temperature of chemical vapor deposition affect the lengths, diameters, density, and uniformity of the carbon nanotubes. The carbon nanotubes of the present invention are useful in electrochemical applications as well as in electron emission, structural composite, material storage, and microelectrode applications.
Owner:THE RES FOUND OF STATE UNIV OF NEW YORK

Biocompatible implant and use of the same

InactiveUS20060252981A1Good biological affinityStrong enoughImpression capsEye implantsRough surfaceBiological body
The present invention provides an implant capable of being cellularized in treatment of an injured organ or tissue in organisms. The present inventors found that a biocompatible implant comprising a biological molecule and a support is capable of being cellularized. The implant can be used instead of conventional implants which essentially comprise cells. The present invention provides a biocompatible implant comprising A) a biological molecule and B) a support. The present invention also provides A) a first layer having a rough surface, B) a rough surface; B) a second layer having a strength which allows the support to resist in vivo shock. The first layer is attached to the second layer via at least one point.
Owner:CARDIO

Organoaminodisilane precursors and methods for depositing films comprising same

Described herein are precursors and methods for forming silicon-containing films. In one aspect, there is provided a precursor of Formula I:wherein R1 is selected from linear or branched C3 to C10 alkyl group, linear or branched C3 to C10 alkenyl group, linear or branched C3 to C10 alkynyl group, C1 to C6 dialkylamino group, electron withdrawing group, and C6 to C10 aryl group; R2 is selected from hydrogen, linear or branched C1 to C10 alkyl group, linear or branched C3 to C6 alkenyl group, linear or branched C3 to C6 alkynyl group, C1 to C6 dialkylamino group, C6 to C10 aryl group, linear or branched C1 to C6 fluorinated alkyl group, electron withdrawing group, and C4 to C10 aryl group; optionally wherein R1 and R2 are linked together to form ring selected from substituted or unsubstituted aromatic ring or substituted or unsubstituted aliphatic ring; and n=1 or 2.
Owner:VERSUM MATERIALS US LLC

Solid organometallic compound-filled container and filling method thereof

A novel filled container is provided, which can stably supply an apparatus for vapor phase epitaxial growth such as an MOCVD apparatus with a solid organometallic compound over a long term. The solid organometallic compound-filled container has a carrier gas inlet and a carrier gas outlet. The interior of the filled container is separated into a plurality of vertical compartments. A carrier gas introduced via the carrier gas inlet flows through each of the vertical compartments and is then discharged via the carrier gas outlet.
Owner:TOSOH FINECHEM CORP

Compositions and methods for use in three dimensional model printing

InactiveUS7300619B2Similar elasticitySimilar strengthButtonsLiquid surface applicatorsOrganic compoundPolymer chemistry
A pseudo composite material, may include, inter alia, a first phase and a second phase, wherein each phase may include, inter alia, an organic compound, wherein each phase comprising a multiplicity of construction layers, wherein the layers were deposited by ink-jet printing, wherein the pseudo composite material exhibits non-homogeneous three-dimensional structure. A method is disclosed for the preparation of a pseudo composite material. An apparatus is disclosed for printing a pseudo composite material. Furthermore, there is disclosed a method for printing a three-dimensional object using various suitable materials.
Owner:STRATASYS LTD

Degradable implantable medical devices

Devices and methods are provided for an implantable medical device which is degradable over a clinically relevant period of time. The medical devices may have the form of implants, graft implants, vascular implants, non vascular implants, wound closure implants, sutures, drug delivery implants, biologic delivery implants, urinary tract implants, inter-uterine implants, organ implants, bone implants including bone plates, bone screws, dental implants, spinal disks, or the like. In preferred embodiments, the implantable medical device comprises an implantable luminal prosthesis, such as vascular and non-vascular stents and stents grafts.
Owner:ELIXIR MEDICAL CORP

Compositions and methods for use in three dimensional model printing

Compositions for use in the manufacture of three-dimensional objects including compositions for use as a support and / or release material in the manufacture of the three-dimensional objects are provided. There is thus provided, in accordance with an embodiment of the present invention, a composition suitable for building a three-dimensional object. The compositions may include, inter alia, a curable component, having a functional group, wherein if the functional group is a polymerizable reactive functional group, then the functional group is a (meth)acrylic functional group, a photo-initiator, a surface-active agent and a stabilizer; wherein said composition has a first viscosity of about 50–500 cps at a first temperature, wherein said first temperature is ambient temperature, and a second viscosity lower than 20 cps at a second temperature wherein said second temperature is higher than said first temperature, wherein, after curing, the composition results in a solid form. There is thus provided, in accordance with another embodiment of the present invention, a composition suitable for support in building a three-dimensional object. The compositions may include, inter alia: a non-curable component, a curable component, wherein the non-curable component is not reactive with said curable component, a surface-active agent and a stabilizer; wherein said composition has a first viscosity of about 20–500 cps at a first temperature, wherein said first temperature is ambient temperature, and a second viscosity lower than 20 cps at a second temperature wherein said second temperature is higher than said first temperature, wherein, after irradiation, the composition results in a solid, a semi-solid or liquid material. A method for the preparation of a three-dimensional object by three-dimensional printing is provided in accordance with embodiments of the present invention. Embodiments of the present invention further provide a three-dimensional object prepared according to the methods of the invention.
Owner:STRATASYS LTD

Isosorbide containing polyesters and methods for making same

A polyester polymer and method for making the polyester, wherein the polyester is prepared by (1) combining in a reactor a monomer containing a diacid moiety; a monomer comprising a diol moiety; and a monomer containing an isosorbide moiety; with a condensation catalyst suitable for condensing aromatic diacids and diols; and (2) heating the monomers and catalyst to polymerize the monomers to yield a polyester having an inherent viscosity of at least about 0.15 dL / g.
Owner:EI DU PONT DE NEMOURS & CO

Oxygen scavenging condensation copolymers for bottles and packaging articles

Compositions for scavenging oxygen are disclosed. These compositions comprise condensation copolymers comprising predominantly polyester segments and an oxygen scavenging amount of polyolefin oligomer segments. The polyester segments comprise segments derived from typical bottling and packaging polyesters such as PET and PEN. The copolymers are preferably formed by transesterification during reactive extrusion and typically comprise about 0.5 to about 12 wt % of polyolefin oligomer segments. The copolycondensates are capable of absorbing at least 0.4 cc of oxygen per gram of copolymer in the solid state at ambient temperatures and are typically used as layers in films, liners, cups, wraps, bottles, etc. Use of these oxygen scavenging compositions in bottles provides a clear and rigid bottle similar in appearance to unmodified polyester bottles. In a series of preferred embodiments, bottles fabricated with the oxygen scavenging copolycondensates of this invention are over 99.4 wt % polyester and suitable for recycle with other polyester bottles.
Owner:COLORMATRIX HLDG

Dimensionally stable balloons

InactiveUS6905743B1Minimal longitudinalIncrease heightSurgeryMedical devicesFiberMedicine
A medical balloon composed of a micro-composite material which provides for radial expansion of a balloon to a predetermined extent, but which has minimal longitudinal growing during balloon inflation. The micro-composite material includes a fibril component, a matrix component, and optionally, a compatibilizer. The fibril component may preferably be liquid crystal polymer fibers randomly scattered through out the balloon material. The liquid crystal polymers are created by extrusion at high speed. An alternative fibril component may be a PET fibers which are uniformly spaced about the balloon material and extend through out the length of the balloon material tube.
Owner:BOSTON SCI SCIMED INC

Intraluminal prostheses having polymeric material with selectively modified crystallinity and methods of making same

Methods of manufacturing polymeric intraluminal prostheses include annealing the polymeric material to selectively modify the crystallinity thereof. Annealing may be utilized to selectively modify various properties of the polymeric material of an intraluminal prosthesis, including: selectively increasing the modulus of the polymeric material; selectively increasing the hoop strength of the intraluminal prosthesis; selectively modifying the elution rate (increase or decrease) of a pharmacological agent subsequently disposed on or within the annealed polymeric material; selectively increasing / decreasing stress in the intraluminal prosthesis; and selectively modifying the polymeric material such that it erodes at a different rate.
Owner:SYNECOR LLC

Functional Materials and Novel Methods for the Fabrication of Microfluidic Devices

The presently disclosed subject matter provides functional perfluoropolyether (PFPE) materials for use in fabricating and utilizing microscale devices, such as a microfluidic device. The functional PFPE materials can be used to adhere layers of PFPE materials to one another or to other substrates to form a microscale device. Further, the presently disclosed subject matter provides a method for functionalizing the interior surface of a microfluidic channel and / or a microtiter well. Also the presently disclosed subject matter provides a method for fabricating a microscale structure through the use of a sacrificial layer of a degradable material.
Owner:THE UNIV OF NORTH CAROLINA AT CHAPEL HILL

Heat exchanger

Heat exchange inefficiencies found in round tube plate fin heat exchangers are eliminated in an aluminum heat exchanger that includes first and second headers (20), (22) and at least one flattened tube (24), (70) extending between the headers (20), (22). A plurality of generally parallel tube runs are defined and each has opposite edges. A plurality of plate fins (26), (50) are arranged in a stack and each has a plurality of open ended slots (34), one for each run of the tubes (24), (70). Each of the tube runs (24), (70) is nested within corresponding slots (26) and the fins (26), (50) with one of the edges (40) of the tube runs extending outwardly of the corresponding fin (34). The assembly is brazed together.
Owner:MODINE MFG CO

Fibers made from copolymers of ethylene/alpha-olefins

A fiber is obtainable from or comprises an ethylene / α-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle and a density, d, in grams / cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re>1481−1629(d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven or non-woven fabrics can be made from such fibers.
Owner:DOW GLOBAL TECH LLC

Polymer coating for medical devices

Coatings are provided in which surfaces may be activated by covalently bonding a silane derivative to the metal surface, covalently bonding a lactone polymer to the silane derivative by in situ ring opening polymerization, and depositing at least one layer of a polyester on the bonded lactone. Biologically active agents may be deposited with the polyester layers. Such coated surfaces may be useful in medical devices, in particular stents.
Owner:CV THERAPEUTICS INC

Non-compliant medical balloon having an integral non-woven fabric layer

A non-compliant medical balloon may be changed from a deflated state to an inflated state by increasing pressure within the balloon. The non-compliant medical balloon is composed of a matted fabric layer composed of at least two matted fabric fibers forming an angle. The angle remains substantially unchanged when the balloon changes from a deflated state to an inflated state..
Owner:BARD PERIPHERAL VASCULAR

Systems and methods for harvesting and integrating nanowires

The present invention is directed to methods to harvest, integrate and exploit nanomaterials, and particularly elongated nanowire materials. The invention provides methods for harvesting nanowires that include selectively etching a sacrificial layer placed on a nanowire growth substrate to remove nanowires. The invention also provides methods for integrating nanowires into electronic devices that include placing an outer surface of a cylinder in contact with a fluid suspension of nanowires and rolling the nanowire coated cylinder to deposit nanowires onto a surface. Methods are also provided to deposit nanowires using an ink-jet printer or an aperture to align nanowires. Additional aspects of the invention provide methods for preventing gate shorts in nanowire based transistors. Additional methods for harvesting and integrating nanowires are provided.
Owner:ONED MATERIAL INC

Oilfield elements having controlled solubility and methods of use

ActiveUS8231947B2Ease of the element traversingEnvelopes/bags making machineryLayered productsSolubilityPolyamide
Oilfield elements are described, one embodiment comprising a combination of a normally insoluble metal with an element selected from a second metal, a semi-metallic material, and non-metallic materials; and one or more solubility-modified high strength and / or high-toughness polymeric materials selected from polyamides, polyethers, and liquid crystal polymers. Methods of using the oilfield elements in oilfield operations are also described. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims.
Owner:SCHLUMBERGER TECH CORP

Films having a desiccant material incorporated therein and methods of use and manufacture

Film structures, packages, films and methods of making the same are provided wherein the film structures have a desiccant material incorporated into at least one layer of the film structures and further wherein the film structures can comprise a material for making a peelable seal when the film structures are heat sealed to other film structures. The film structures are utilized for a package to hold a product that may be sensitive to the presence of moisture. The product may preferably be pharmaceutical products, nutraceutical products, or devices such as absorbable sutures or medical stents, although any moisture-sensitive product is contemplated by the present invention.
Owner:ALCAN PACKAGING FLEXIBLE FRANCE
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