Patents Examined by Terressa Mosley
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Patent number: 6028163Abstract: A process for making a high molecular weight poly(phosphoester) comprising the recurring monomeric units: ##STR1## wherein X is --O-- or --NR"--, where R" is H or alkyl; L is a divalent organic moiety, with the proviso that L cannot have the formula ##STR2## R' is H, alkyl, alkoxy, aryl, aryloxy, heterocyclic, or heterocycloxy; and n is from about 25 to 2000,is described. The process comprises the steps of:(a) substantially dissolving p moles of a di-XH compound in a solvent comprising more than 75% toluene at a first temperature between about -75.degree. C. and 60.degree. C. to form a reaction mixture;(b) while maintaining the reaction mixture at the first temperature, adding q moles, where p.apprxeq.q, of a phosphorodihalo compound;(c) gradually increasing said first temperature at a rate of less than about 2.degree. C. per minute as necessary to achieve a second temperature between about 0.degree. C. and 110.degree. C.Type: GrantFiled: June 27, 1997Date of Patent: February 22, 2000Assignee: Guilford Pharmaceuticals Inc.Inventor: Zhong Zhao
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Patent number: 6028162Abstract: An epoxy resin-free coating system based on thermoplastic polyesters into which a polyester is incorporated as adhesion-promoting additive, which polyester is non-toxic.Type: GrantFiled: August 20, 1998Date of Patent: February 22, 2000Assignee: Huels AktiengesellschaftInventors: Siegfried Hahn, Rainer Spittka
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Patent number: 6022943Abstract: Increasing the endcap level to a level greater than about 90% for Optical Quality (OQ) Melt Polycarbonate significantly reduces the as-molded static charge for injection molded parts for Optical Disc applications. The use of resins with higher endcap levels in combination with antistatic additives provides a highly robust formulation suitable for even the most demanding emerging formats as Digital Versatile Disc (DVD) and in all commercial Optical media molding machines. Thus, optical quality polycarbonates are prepared by performing a base-catalyzed polymerization of a diaryl carbonate and a dihydric phenol under conditions effective to produce a polycarbonate product having an endcap level of 90% or greater.Type: GrantFiled: April 7, 1999Date of Patent: February 8, 2000Assignee: General Electric CompanyInventors: Kazushige Inoue, Hiromi Ishida, Tomoaki Shimoda, Theodorus L. Hoeks, Henricus H. M. van Hout, Monica M. Marugan, David M. Dardaris, Patrick J. McCloskey
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Patent number: 6022925Abstract: A process for producing a coating compositions for use over chalky substrates comprising a partial interpenetrating network of a polyurethane component and a waterborne polymer component, wherein the polyurethane component is prepared in the presence of the waterborne polymer component.Type: GrantFiled: June 23, 1998Date of Patent: February 8, 2000Assignee: The Sherwin-Williams CompanyInventors: Revathi R. Tomko, Louisa D. DiCola, Lorette Madigan, David J. Tetzlaf
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Patent number: 6022941Abstract: Polycarbonate can be branched by reactive extrusion using free radical chemistry. This technology combines the effect of free radical initiator and branching agent on polycarbonate during processing. Melt Strength of polycarbonate can be increased by addition of a triacrylate as branching agent and peroxide as radical initiator.Type: GrantFiled: April 1, 1998Date of Patent: February 8, 2000Assignee: General Electric CompanyInventors: Raphael Mestanza, Theodorus L. Hoeks, Johannes J. De Bont
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Process for deactivation of polyolefin compositions utilizing carbon dioxide as a deactivation agent
Patent number: 6022946Abstract: A method of deactivating a polyolefin polymer is disclosed whereby the polymer is contacted in a post-reactor vessel with CO.sub.2 and then an acid acceptor and at least one secondary antioxidant are incorporated into the deactivated polyolefin polymer. The resulting product displays improved color and reduced melt flow breaking tendency, and does not exhibit polymer agglomeration and stickiness.Type: GrantFiled: December 23, 1998Date of Patent: February 8, 2000Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: James Douglas McCullough, Jr. -
Patent number: 6022942Abstract: There is provided herein an optical storage media which has low VBR. In a preferred embodiment, there is provided an optical disk comprising a genus of copolycarbonates, including copolyestercarbonates, which have excellent physical and optical properties. Said copolycarbonates have proportions of structural units which fall within a specific composition range, and said range defines certain materials, a large percentage of which can be molded into optical disks having the desired optical properties, including low VBR.Type: GrantFiled: January 5, 1999Date of Patent: February 8, 2000Assignee: General Electric CompanyInventors: Kenichi Ishiwa, Henricus H. M. van Hout, Ali Dhinojwala, Niles R. Rosenquist, Paul D. Sybert, Steven F. Hubbard, Paul C. Raymond, III, Joseph A. King, Jr., Gary C. Davis
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Patent number: 6020061Abstract: An emulsion polymerization system comprising a polymeric stabilizer, wherein the polymeric stabilizer comprises one or more alpha olefin/maleic anhydride copolymers and is present in the emulsion polymerization system in an amount greater than 0 and less than 5% by weight.Type: GrantFiled: April 15, 1997Date of Patent: February 1, 2000Assignee: S. C. Johnson Commercial Markets, Inc.Inventors: Steven M. Hurley, Frederick C. Hansen
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Patent number: 6017618Abstract: A storage media for storing information having a substrate. The substrate has an upper surface and a molecular weight greater than 5,000. Preferably the material is a polymer. The material has a plurality of piles of molecular chains in selected areas formed by pushing the molecular chains of the material on its upper surface to the selected area mechanically with a mechanical tool. The piles represent written information. The mechanical tool is preferably an atomic force microscope. Another aspect of the present invention is a method for storing information having the steps of selecting a material substrate having an upper surface and pushing molecules on the upper surface into a molecular pile at selected locations.Type: GrantFiled: October 29, 1997Date of Patent: January 25, 2000Assignee: International Business Machines CorporationInventors: Arunava Gupta, Ravi Saraf
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Patent number: 6018014Abstract: An aromatic polycarbonate containing a structural unit of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, Ar.sup.1 is a substituted or unsubstituted aryl group and Ar.sup.2 and Ar.sup.3 are independently a substituted or unsubstituted arylene group. The aromatic polycarbonate is capable of transferring charges and is used for forming a photosensitive layer of an electrophotographic photosensitive medium.Type: GrantFiled: April 10, 1998Date of Patent: January 25, 2000Assignees: Ricoh Company, Ltd., Hodogaya Chemical Co., Ltd.Inventors: Kazukiyo Nagai, Masaomi Sasaki, Hiroshi Tamura, Tetsuro Suzuki, Tomoyuki Shimada, Chihaya Adachi, Chiaki Tanaka, Nozomu Tamoto, Kouji Kishida, Akira Katayama, Mitsutoshi Anzai, Akihiro Imai
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Patent number: 6013761Abstract: A process for the preparation of polyarylene sulfoxides, in which polyarylene sulfide, suspends in a concentrated acid of formula R--SO.sub.3 H, in which R is a halogen atom Ian OH group, an aliphatic radical having 1 to 6 C atoms or an aromatic radcal having 6 to 18 C atoms, or of the formula R.sup.1 --CR.sup.2 R.sup.3 --COOH, in which R.sup.1 is a halogen atom and R.sup.2 and R.sup.3, independently of one another are each a halogen atom, an aliphatic radical having 1 to 50 atoms or a halogenated aliphatic radical having 1 to 5 C atoms, is oxidized by metering in a 30 to 85% strength hydrogen peroxide solution with thorough mixing and at a temperature of from -20 to +45.degree. C. According to this process, the sulfide units of the polyarylene sulfide are converted virtually selectively and completely into sulfoxide units.Type: GrantFiled: November 19, 1998Date of Patent: January 11, 2000Assignee: Ticona GmbHInventors: Dirk Zierer, Helmut Scheckenbach
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Patent number: 6013686Abstract: The present invention relates generally to blowing agent concentrates for forming porous, molded thermoplastic items, and, more particularly to blowing agent concentrates that are compatible with polycarbonate homopolymers, but which can be extruded without causing thermal decomposition of the blowing agent.Type: GrantFiled: February 13, 1998Date of Patent: January 11, 2000Assignee: General Electric CompanyInventors: Douglas G. Hamilton, Steven R. Peak, Randall A. Reed
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Patent number: 6013756Abstract: The invention relates to a process for producing polyesters, especially high-molecular polyethylene terephthalate (PET) using titanium-containing catalyst-inhibitor combinations.Type: GrantFiled: February 12, 1998Date of Patent: January 11, 2000Assignee: Karl Fischer Industrieanlagen GmbHInventors: Rainer Hagen, Eckehart Schaaf, Heinz Zimmermann
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Patent number: 6011132Abstract: Polyester compositions containing terephthalate, 2,6-naphthalate and/or isophthalate moieties, and showing improved properties are disclosed.Type: GrantFiled: July 11, 1997Date of Patent: January 4, 2000Assignee: BP Amoco CorporationInventors: Edward E. Paschke, Charles W. Bauer, Frank C. Robertson, James M. Tibbitt
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Patent number: 6007749Abstract: A water injection foaming devolatilizing method, and an apparatus for practicing the method according to the invention are designed as follows: A molten polymer material is kneaded in a water-injection dispersion zone (11) of an extruding machine having a pair of screws (6) each of which is turned in the same direction. Water is supplied to the molten polymer material, thus the water being dispersed therein while the molten polymer material is kneaded. In a devolatilizing zone (12) downstream of the water-injection dispersion zone, the volatile components in the molten polymer material are removed by being gasified together with the water. In this water injection foaming devolatilizing method, the molten polymer material is smoothly extruded from the filling zone (10) to the water-injection dispersion zone (11), and in the latter zone (11) water injection is performed with increased pressure due to the aid of a ring (15), thereby to achieve the devolatilizing of the molten polymer material.Type: GrantFiled: March 5, 1998Date of Patent: December 28, 1999Assignee: The Japan Steel Works, Ltd.Inventors: Ning-He Wang, Norimasa Oda, Seiji Takamoto, Yoshitaka Kimura, Hideki Mizuguchi
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Patent number: 6008315Abstract: A phenol and a ketone are reacted to form bisphenol, and the liquid bisphenol obtained or a mixed solution of said solution and a phenol is filtered through a calcined metal filter to obtain bisphenol which makes it possible to efficiently obtain bisphenol which either does not contain fine particulate impurities or contains such impurities only in minute amounts, and a method for manufacturing polycarbonate using bisphenol obtained by this method. The filtration grade of the calcined metal filter should be 1.0 .mu.m or less. After filtering, the calcined metal filter can be backwashed or chemically washed and then reused. The bisphenol should preferably be bisphenol A.Type: GrantFiled: December 10, 1998Date of Patent: December 28, 1999Assignee: General Electric CompanyInventors: Takato Kimura, Satoru Omori, Ryozo Sato, Tomoaki Shimoda
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Patent number: 6001952Abstract: A polymer composition having naphthalenedicarboxylic residue includes a fluorescence quenching benzylidene compound capable of absorbing ultraviolet light radiation. In a preferred embodiment, the composition includes at least a 0.1 mole percent of naphthalene-2,6-dicarboxylate and about 0.01 mole percent to about 5 mole percent of a benzylidene compound having the following structure: ##STR1## wherein R is selected from the group consisting of hydrogen, C.sub.1 -C.sub.8 alkyl, substituted C.sub.1 -C.sub.8 alkyl, C.sub.3 -C.sub.8 alkenyl, C.sub.3 -C.sub.8 alkynyl, C.sub.3 -C.sub.8 cycloalkyl, C.sub.3 -C.sub.8 cycloalkenyl and --R.sub.2 --X, wherein R.sub.2 is selected from the group consisting of C.sub.1 -C.sub.8 alkylene, C.sub.2 -C.sub.8 alkylene-O--C.sub.2 -C.sub.8 alkylene, C.sub.2 -C.sub.8 alkylene-S--C.sub.1 -C.sub.8 alkylene, C.sub.2 -C.sub.8 alkylene, C.sub.2 -C.sub.8 alkylene-S--C.sub.2 -C.sub.8 alkylene, C.sub.2 -C.sub.8 alkylene-N(SO.sub.2 C.sub.1-C.sub.8 alkyl)-C.sub.2 -C.sub.Type: GrantFiled: June 10, 1998Date of Patent: December 14, 1999Assignee: Eastman Chemical CompanyInventors: Karen Lynn Carman, Martin Emerson Rogers, Allan Scott Jones, Max Allen Weaver
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Patent number: 6001953Abstract: The invention relates to polycarbonates suitable for use in optical articles; the polycarbonates contain residues of alicyclic bisphenols and have properties particularly suited for use in high density optical data storage media. The polycarbonates further contain residues of other monomers, such as SBI and its derivatives; bisphenols, such as bisphenol A; CD-1 and its derivatives or some combination of each.Type: GrantFiled: March 18, 1999Date of Patent: December 14, 1999Assignee: General Electric CompanyInventors: Gary Charles Davis, Andrew James Caruso, Joseph Richard Wetzel, Ramesh Hariharan, Marc Brian Wisnudel
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Patent number: 6001951Abstract: An aromatic polycarbodiimide comprising a structural repeating unit represented by the following formula (I): ##STR1## wherein n is an integer of 2 to 200.Type: GrantFiled: November 5, 1998Date of Patent: December 14, 1999Assignee: Nitto Denko CorporationInventors: Takahiro Fukuoka, Masahiro Yoshioka, Michie Sakamoto, Amane Mochizuki
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Patent number: 6001889Abstract: A polymer having a fractal configuration of structure which is self-similar or is scale invariant at different scales. As a consequence of their fractal configuration, such polymers have superior properties as an interstitial material for the adsorption of substances, and are useful as an additive or adjunct to ion exchange, filtration and membrane separation of compounds.Type: GrantFiled: March 4, 1998Date of Patent: December 14, 1999Assignee: Steripak Pty Ltd.Inventor: Michel S. M. Lefebvre