Patents Assigned to Princeton Polymer
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Patent number: 4639396Abstract: An extrusion drawn elongated thread-like filament comprising a minor proportion of elongated metal fibers embedded in a major proportion of thermoplastic polymer wherein the melting temperature of said metal is within the softening to molten range of said polymer and wherein said metal fiber is unidirectional and extends into the elongated length of said polymer.Type: GrantFiled: July 19, 1984Date of Patent: January 27, 1987Assignee: Princeton Polymer LaboratoriesInventor: Mohammad A. Semsarzadeh
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Patent number: 4582872Abstract: Metallized polymers are made by melting the metal and polymer together. The products have improved impact resistance and electrical and thermal conductivity. They can also be used for electromagnetic interference shielding.Type: GrantFiled: January 28, 1985Date of Patent: April 15, 1986Assignee: Princeton Polymer LaboratoriesInventors: Donald E. Hudgin, Mohammad A. Semsarzadeh
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Patent number: 4495311Abstract: A degradable composition is made from a polymer of a mono olefin having 2--3 carbon atoms or styrene and an additive comprising (1) a derivative of an organic compound of a metal which has at least two valence states and (2) a benzoyl derivative of an organic compound or a triazole.Type: GrantFiled: March 27, 1974Date of Patent: January 22, 1985Assignee: Princeton Polymer Laboratories, Inc.Inventors: Donald E. Hudgin, Thomas Zawadzki
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Patent number: 4278721Abstract: A thermal barrier having a corrugated structure which eliminates convection losses and greatly reduces conduction losses. The invention relates to various methods of reducing infra-red radiation loss. The channels formed by the corrugations have a length much greater than their thickness. In one embodiment, grooves are provided in the sheet forming the corrugations. In another embodiment, an infra-red absorptive coating is applied to the sheet forming the corrugations. In the third embodiment, infra-red scattering material is disposed in the channels of the corrugated material.Type: GrantFiled: August 23, 1979Date of Patent: July 14, 1981Assignee: Princeton PolymerInventor: Richard H. Hudgin
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Patent number: 4260548Abstract: Low molecular weight ethylene homo and copolymer waxes are prepared by using a combination of (1) incremental addition of free radical catalyst (2) at high temperatures up to 150.degree. C. and (3) high pressures up to 3000 psi. Preferably molten aliphatic waxes are used as the solvent.Type: GrantFiled: June 4, 1979Date of Patent: April 7, 1981Assignee: Princeton Polymer LaboratoriesInventors: Donald E. Hudgin, Thomas Zawadzki
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Patent number: 4171699Abstract: A steam sterilizable copolymer is prepared from 60 to 50% by weight of alpha methyl styrene and 40 to 50% by weight of methyl methacrylate. The copolymer is useful to make the barrel of syringe which is clear, water-white and shows no distortion upon steam sterilization for at least 20 minutes at 250.degree. F.Type: GrantFiled: May 9, 1977Date of Patent: October 23, 1979Assignee: Princeton Polymer Laboratories, Inc.Inventors: William D. Jones, Donald E. Hudgin
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Patent number: 3997624Abstract: Low molecular weight ethylene homo and copolymer waxes are prepared at pressures below 1000 psi and at temperatures below 120.degree. C. using free radical catalysts having 10-hour half-lifes at not over 60.degree. C.Type: GrantFiled: October 1, 1975Date of Patent: December 14, 1976Assignee: Princeton Polymer Laboratories, IncorporatedInventor: Donald E. Hudgin
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Patent number: 3981856Abstract: A degradable composition is made from a polymer of a mono olefin having 2-3 carbon atoms or styrene and an additive comprising (1) a derivative of an organic compound of a metal which has at least two valence states and (2) a benzoyl derivative of an organic compound or a triazole.Type: GrantFiled: January 20, 1975Date of Patent: September 21, 1976Assignee: Princeton Polymer Laboratories, IncorporatedInventors: Donald E. Hudgin, Thomas Zawadzki
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Patent number: 3975350Abstract: Improved active agent systems with novel carriers as membrane, release, and coating polymers for said active agents; the polymers are water absorptive polyurethane polymers prepared from resins having a low ratio of carbon to oxygen to nitrogen or having ionic, quaternary ammonium or salt groups in the resin backbone and a low amount of isocyanate; the water absorptivity of the polyurethane polymers is above 10%, preferably above 20%, and these polymers may range to completely gel-like, high water absorbtive polymers; these active agent polymers are useful as in medicinal, insecticidal, pesticidal, algaecidal, etc. applications; as well as zero release agents, body implants and coatings requiring hydrophilic properties; other use for the active agent systems are in sensing membranes or coatings or ion transport recognition devices such as in gaseous or liquid media; as a hydrogel providing a leachable matrix wherein the leaching agent may be body fluids, e. g., animals or human, e. g.Type: GrantFiled: June 25, 1974Date of Patent: August 17, 1976Assignee: Princeton Polymer Laboratories, IncorporatedInventors: Donald Edward Hudgin, Edgar Allan Blair