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128 results about "Prolonged exposure" patented technology

Fiber reinforced polymer oilfield tubulars and method of constructing same

A technique facilitates construction of high temperature fiber reinforced polymer oilfield tubulars. The technique comprises a method of combining a fiber material and a high temperature thermoset resin to create a high performance composite material. The composite material is formed into an oilfield tubular that can be used in a variety of downhole applications. The method of combining the high performance materials with low modulus, high temperature coating materials during the manufacturing process produces composite tubular products that can survive prolonged exposure to deleterious well fluids in high temperature and high pressure downhole environments.
Owner:SCHLUMBERGER TECH CORP

Biocompatible cemented carbide articles and methods of making the same

InactiveUS20070082229A1Eliminate and minimize toxic effectReduce concentrationSurgeryJewelleryBiocompatibility TestingAlloy
This invention relates to cemented carbide articles that are characterized by substantially improved biocompatibility with human skin, tissue, organs, etc., compared with articles made from conventional cemented carbides. The essential feature of these improved biocompatible cemented carbide articles is a binder-depleted zone at and near the exposed surfaces of the articles. By depleting the binder (which mainly consists of Co and / or Ni, as well as their alloys) at and near the surface, the toxic effects of Co and Ni (known carcinogens), as well as the allergic reactions that these metals can cause when in contact with human skin, are eliminated. By depleting the binder only at and near the surface, the bulk properties of the cemented carbide article are not compromised or altered in any manner. Applications of these binder-depleted cemented carbides could include articles that human skin may experience prolonged exposure to, for example, jewelry articles such as rings, bracelets, bangles, chains, necklaces, pendants, watches, watch cases, watch straps, etc. In addition, the cemented carbides of this invention may be used in applications where the article comes directly in contact with human skin, tissue, organs, etc. such as surgical and other medical instruments, razor blades, etc. Also, other applications could include knives, tools, dies, and other wear components that are used to process and handle, and hence, come into direct contact with materials meant for human consumption and / or ingestion. Examples of such materials include foodstuffs and pharmaceuticals.
Owner:MIRCHANDANI RAJINI P +1

Fluorinated resins having a surface with high wettability

A fluorinated resin having enhanced wettability to water prepared by roughening a surface of the fluorinated resin such that a central line roughness average (Ra) of the surface is increased to at least 0.1 mum, and then depositing thereon a thin hydrophilic film while maintaining the central line roughness average (Ra) of at least 0.1 mum, the thin hydrophilic film being formed from a hydrophilic substance having a contact angle of water of less that 90°, and the resulting fluorinated resin having up to 20° of contact angle of water. The fluorinated resins are able to maintain high hydrophilicity even after prolonged exposure to the atmosphere and can be used in various fields that require bio-compatibility and in permeable membranes or filters.
Owner:SAMSANG CORP

Method and apparatus for securely associating an optically readable memory with a user machine

A CD-ROM has an obscurable section wherein exists a photosensitive mask material layer or constituent operative to alter the optical properties of areas subjected to prolonged exposure to the CD-ROM read laser radiation. Digital information stored on a CD-ROM is made accessible by use of a password, which is generated from user machine unique information, and which is written on the CD-ROM via selective exposure of the CD-ROM to the radiation used to read the CD-ROM.
Owner:GLOBAL ANTI PIRACY SYST

Methods and devices for enhanced biocompatibility

The present invention is directed to devices with enhanced biocompatibility and methods for generating and utilizing such devices. The present invention is further directed to enhanced biocompatibility utilizing oligonucleotide functionalization. In one aspect, a device for implantation and / or prolonged exposure to the body tissues includes a functionalized surface. The functionalized surface generally enhances the biocompatibility of the device with body tissues. In some embodiments, the functionalized surface includes substances for controlling interaction between the device and the body tissues. Substances for controlling interactions may include, but are not limited to, polymeric materials, biomolecules, ions and / or ion-releasing substances, and / or any other appropriate substance or combination thereof. In exemplary embodiments, the functionalized surface includes oligonucleotides for controlling interaction between the device and the body tissues. In some exemplary embodiments, the oligonucleotides are aptamers.
Owner:BIOTEX

System for monitoring intraocular pressure

The invention discloses a system for monitoring intraocular pressure. The system comprises a wireless pressure sensor and a portable signal receiving processor, wherein the wireless pressure sensor is implanted below the conjunctiva of limbus cornea and is directly contacted with an episcleral tissue; the pressure sensor comprises a flexible microelectrode array and a signal processing and transmitting unit; the flexible microelectrode array is used for sensing the impedance change of the surface of the episcleral tissue; the signal processing and transmitting unit is used for converting the impedance change into a voltage signal and processing and sending out the voltage signal; and the signal receiving processor is used for receiving the signal and analyzing and fitting the signal to acquire a numerical value of the intraocular pressure and storing and displaying the numerical value. The system for monitoring the intraocular pressure can automatically and continuously monitor the intraocular pressure of a patient for 24 hours without influencing the normal physical activity of the patient so as to provide sufficient and accurate data for clinical diagnosis and therapy. Furthermore, the pressure sensor is directly contacted with the episcleral tissue so as to avoid injury, infection, anoxia and the like of cornea when the pressure sensor is contacted with a corneal tissue for a long time.
Owner:PEOPLES HOSPITAL PEKING UNIV

Water swellable rubber composition having stable swelling property at high temperatures

InactiveUS20130269787A1High and sustained swellingHigh degree of swellingOther chemical processesPipeline systemsElastomerEthylene oxide
A water swellable rubber composition comprising (a) a non-water swellable base rubber, (b) a crosslinkable ethylene oxide based hydrophilic elastomer having at least one curable functional group, and (c) a water swellable non-elastomeric material. The composition has excellent water swell characteristics under prolonged exposure to high temperature and various electrolyte solutions (strong salinity as well as acid conditions) and is particularly suitable for oil field applications.
Owner:ZEON CHEMICALS LP
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