Patents Examined by Andrew E. C. Merriam
  • Patent number: 6339116
    Abstract: Biobased cross-linked compositions, methods of fabrication and structures, in particular biobased printed wiring boards using the compositions and methods of making the structures are described. Biobased materials such as lignin, crop oils, wood resins, tannins, and polysaccharides and combinations thereof are cross-linked, preferably using heat, a cross-linking agent, and an initiator. The materials fabricated have suitable properties for printed wiring boards which are made by impregnating a fiberglass or biobased cloth with an admixture of the biobased material, cross-linking agent and initiator which is processed by conventional methods to produce a printed wiring board.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: January 15, 2002
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Jeffrey Donald Gelorme, Laura Louise Kosbar
  • Patent number: 6197848
    Abstract: A composition comprising an ethylene containing polymer, a crosslinking agent and a treated filler material. The treated filler material comprises a treating agent which is a polymer comprising acrylonitrile and at least one other monomer. A preferred treated filler material is a treated carbon black and a preferred ethylene containing polymer is an ethylene vinyl acetate (EVA) polymer. A semiconductive composition of the present invention may be advantageously utilized in electrical wire and cable application.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: March 6, 2001
    Assignee: Cabot Corporation
    Inventors: Robert S. Whitehouse, Thomas F. Reed
  • Patent number: 6172131
    Abstract: Hydrolysis-stable and polymerizable acrylphosphonic acids are described which are particularly suitable as a component of dental adhesives owing to their adhesion-promoting properties.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: January 9, 2001
    Assignee: Ivoclar AG
    Inventors: Norbert Moszner, Frank Zeuner, Volker Rheinberger
  • Patent number: 6166173
    Abstract: Biodegradable polymers are described comprising the recurring monomeric units shown in formula I or II: wherein X is --O-- or --NR'--, where R' is H or alkyl; L is a branched or straight chain aliphatic group having from 1-20 carbon atoms; M.sub.1 and M.sub.2 are each independently (1) a branched or straight chain aliphatic group having from 1-20 carbon atoms; or (2) a branched or straight chain, oxy-, carboxy- or amino-aliphatic group having from 1-20 carbon atoms; Y is --O--, --S-- or --NR'--, where R' is H or alkyl; R is H, alkyl, alkoxy, aryl, aryloxy, heterocyclic or heterocycloxy; the molar ratio of x:y is about 1; the molar ratio n:(x or y) is between about 200:1 and 1:200; and the molar ratio q:r is between about 1:99 and 99:1; wherein said biodegradable polymer is biocompatible before and upon biodegradat.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: December 26, 2000
    Assignees: Guilford Pharmaceuticals Inc., Johns Hopkins University
    Inventors: Hai-Quan Mao, Kam W. Leong, Zhong Zhao, James P. English
  • Patent number: 6160038
    Abstract: A method for dispersing solid forms of additives in polymers involves adding dispersions or solutions of additive(s) to a solution of polymer in a tubular mixer (preferably in the presence of a stationary mixer). The mixer leads to a steam precipitation step wherein all fluid ingredients in the mixture are volatilized leaving the solid additive and resin in the desired ratio. This results in a uniform dispersion of the additives in the polymer matrix. As a result of the high dispersion, physical properties of a thermoplastic resin, to which the polymer matrix has been added are preserved. In one illustration, PTFE as a drip inhibitor additive, is added to polycarbonate to obtain a highly dispersed PTFE concentrate of improved drip-inhibition without loss of mechanical properties when added to a thermoplastic molding resin.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: December 12, 2000
    Assignee: General Electric Company
    Inventors: Qamar S. Bhatia, Paul Buckley, Gary Davis, Robert L. Howe, Wie-Hin Pan, Elliott Shanklin
  • Patent number: 6156379
    Abstract: A metallic coating composition is disclosed which contains bright pigments in the form of metal flakes produced by finely dividing a vapor-deposited metal layer. The metallic coating composition may be applied over a base coating layer. A clear topcoating layer may further be applied over the metallic coating layer.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: December 5, 2000
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Sadao Terada, Hiroyuki Nakasuji
  • Patent number: 6153760
    Abstract: A method for preparing a lens having UV-absorbing properties involves charging to a mold a monomer mixture comprising lens-forming monomers and an essentially non-UV-absorbing compound, and curing the monomer mixture to form a lens, followed by treating the lens to convert the essentially non-UV-absorbing compound to a UV-absorbing agent.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: November 28, 2000
    Assignee: Bausch & Lomb Incorporated
    Inventor: Jay F. Kunzler
  • Patent number: 6153664
    Abstract: A bioerodible cement system, which, upon mixing of the system parts, forms a cured bioerodible cement, said system comprising a first part comprising a first bioerodible polymer capable of producing acidic products upon hydrolytic degradation; and a second part comprising a second bioerodible scaffolding polymer which upon crosslinking provides a biopolymeric scaffolding or internal reinforcement for said cured cement is disclosed. In a preferred embodiment, the second bioerodible polymer comprises polypropylene fumarate (PPF), which is cross-linked during curing, desirably by a vinyl monomer such as vinyl pyrrolidone (VP) to form the biopolymeric scaffolding which provides the cured cement with dimensional and geometric stability.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: November 28, 2000
    Assignee: Cambridge Scientific, Inc.
    Inventors: Donald L. Wise, Joseph D. Gresser, Debra J. Trantolo, Y. Y. Hsu
  • Patent number: 6150432
    Abstract: Disclosed is a polymer blend composition and shaped article, and a process of blending and making shaped articles of polymer blends in which the biocompatibility of various polymers is improved by blending with them a polymer including a zwitterionic group. The zwitterionic group is usually an ammonium phosphate ester, preferably a choline, zwitterionic group and the polymer containing it may be produced by the free radical polymerization of ethylenically unsaturated monomers including a monomer bearing the zwitterionic group. Blending of the two polymers may be achieved by dry blending particulate polymers or by mixing the polymers in liquid dispersion or solution followed by removal of the liquid medium. The fibrinogen absorption and/or platelet activation of polymers may be reduced to a value of less than 80% or even less than 60% of the base polymer by introducing amounts of more than 10% or more than 30% of the zwitterionic group containing polymer.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: November 21, 2000
    Assignee: Biocompatibles Limited
    Inventors: Stephen Alister Jones, Peter William Stratford, Steven Rimmer
  • Patent number: 6150437
    Abstract: Flow improving agents for binder suspensions containing cement are described, which consist of:a) Graft polymers which have been prepared by radical grafting of a polyalkylene oxide of the general formula (I) with an ethylenically unsaturated mono- or dicarboxylic acid or the anhydride thereof, and then by derivatizing with a primary or secondary amine and/or alcohol, and also ofb) Casein.These flow improving agents have the advantage that the ability to flow is considerably improved in comparison, for example, with casein alone, and the improved ability to flow is preserved over a longer period of time.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 21, 2000
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Konrad Wutz, Alfred Kern, Josef Weichmann
  • Patent number: 6147136
    Abstract: The invention relates to dental compositions containing(a) 5 to 70 wt. %, relative to (a)+(b)+(d), of oligomers and/or polymers,(b) 0 to 95 wt. %, relative to (a)+(b)+(d), of fillers,(c) 0.1 to 3 wt. %, relative to (a), of at least one initiator or one initiator system,(d) 0 to 95 wt. %, relative to (a)+(b)+(d), of the usual adjuncts, including pigments, radiopaque additives and/or thixotropy auxiliaries,characterized in that 5 to 100 wt. % of component (a) comprises oligomers or polymers with the general formula ##STR1## or ##STR2## The dental compositions are suitable for producing filling materials, fixing cements, inlays, onlays, veneers, temporary crown and bridge materials, dentistry and impression materials. In compositions with radical curing, slight volume shrinkage occurs during curing, whereas in cement compositions, better mechanical properties are obtained.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: November 14, 2000
    Assignee: ESPE Dental AG
    Inventor: Peter Bissinger
  • Patent number: 6147137
    Abstract: A primer/bonding composition for dental restorations comprising a photoinitiator system and a monomer system consisting essentially of at least one polymerizable acidic component and at least one hydrophilic monomer. The presence of a high viscosity monomer such as Bis-GMA is not required. The composition has excellent bonding properties, and is shelf-stable for at least about one year when stored in one container.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: November 14, 2000
    Assignee: Jeneric/Pentron Incorporated
    Inventor: Weitao Jia
  • Patent number: 6136887
    Abstract: The invention relates to vinylcyclopropane derivatives according to the formula ##STR1## in which A is --[--Y--CO--C(.dbd.CH.sub.2)R.sup.4 ].sub.m or --C(.dbd.CH.sub.2)CO--O--C.sub.1-4 -alkyl, U and X, independently of each other, stand for CO, COO or CONH; Y and Z stand for O or NH or are absent, but Y and Z cannot be absent at the same time; n, m stand for a whole number from 0 to 4, but n and m are not 0 at the same time; R.sup.1 is H, CH.sub.3 or Cl; R.sup.2, R.sup.3 stand for H, a C.sub.1 - to C.sub.10 -alkyl or alkylene radical, which can be interrupted by O, S or NH, for a C.sub.6 - to C.sub.14 -aryl or arylene, C.sub.7 - to C.sub.14 -alkylaryl or alkylarylene or a C.sub.5 - to C.sub.8 -cycloalkyl or cycloalkylene radical; and R.sup.4 is H or a C.sub.1 - to C.sub.10 -alkyl radical, and to processes for their production. The compounds are suitable in particular for the production of adhesives, cements, composites and mouldings.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: October 24, 2000
    Assignee: Ivoclar AG
    Inventors: Norbert Moszner, Volker Rheinberger, Thomas Voelkel, Urs Karl Fischer
  • Patent number: 6136884
    Abstract: A latex composition for hair care containing a hybrid-graft copolymer of a sulfopolyester and an acid-functional polymer segment. The acid-functional polymer segment is formed from at least one acid-functional monomer, at least one ethylenically unsaturated monomer, and at least one amide-containing monomer. Such compositions exhibit superior curl retention even at high humidity.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: October 24, 2000
    Assignee: Eastman Chemical Company
    Inventors: Robert Gow-Sheng Chen, Phillip Michael Cook
  • Patent number: 6136886
    Abstract: To provide a dental prosthetic material having processing characteristics and operating characteristics, which are not recognized in a conventional dental material.A biorestorative material which is a rubber elastic material having a shear modulus of 1.0-9.99 E+4 Pa to 1.0-9.99 E+9 Pa and a rubber hardness of 1 to 90, wherein a Knoop hardness can be 10 or more after polymerization.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: October 24, 2000
    Assignee: Kabushiki Kaisha Shofu
    Inventor: Mikito Deguchi
  • Patent number: 6133340
    Abstract: This invention relates to exothermic and/or insulating sleeves, their method of preparation, and their use. The sleeves are prepared by shaping a sleeve mix comprising (1) a sleeve composition capable of providing a sleeve, and (2) a chemical binder. The sleeves are cured in the presence of a catalyst by the cold-box or no-bake curing process. The invention also relates to a process for casting metal parts using a casting assembly where the sleeves are a component of the casting assembly. Additionally, the invention relates to the metal parts produced by the casting process.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: October 17, 2000
    Assignee: Ashland Inc.
    Inventor: Paulo Roberto Menon
  • Patent number: 6133345
    Abstract: The invention provides for a process for preparing pulverulent polymers by drying aqueous polymer dispersions in the presence of copolymers based on ethylenically unsaturated C.sub.3 -C.sub.6 carboxylic acids and their hydroxyalkyl esters as assistants;polymer powders obtainable by this process;aqueous polymer dispersions obtainable by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of the novel copolymers, and the powders obtainable therefrom, anda polymeric binder as well as and mineral building materials which comprise the novel polymer powders.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: October 17, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Joachim Pakusch, Maximilian Angel, Peter Claassen, Andree Dragon
  • Patent number: 6133343
    Abstract: A cured product of a resinous composition for dental use is neither stained nor discolored while used in the mouth for long periods of time. In addition, the cured product of the composition is not discolored with hot water, and its impact strength is high. The composition is easy to handle, and its storage stability is good. The composition comprises (a) an impact-resistant resinous complex composed of a (meth)acrylic polymer and core-shell structured polymer particles having at least one hard polymer layer, at least one soft polymer layer and an outermost hard polymer layer, wherein the impact-resistant resinous complex contains ionic components in an amount not larger than 0.05% by weight of the resinous composition, (b) (meth)acrylate monomer, and (c) a polymerization initiator.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: October 17, 2000
    Assignee: Kuraray Co., Ltd.
    Inventors: Kenji Hatanaka, Satoshi Yamaguchi, Mitsuo Otani
  • Patent number: 6133368
    Abstract: A dispersant system useful in the formation of dispersions of water soluble polymers is disclosed. The dispersant system comprises two polymers, the first being a copolymer of diallyldimethyl ammonium chloride with a C.sub.6 to C.sub.20 quaternary ammonium salt of a monomer selected the from the group consisting of dialkylaminoalkylacrylates, dialkylaminoalkylmethacrylates, dialkylaminoalkylacrylamides, and dialkylaminoalky (meth) acrylamides as well as certain alkyl esters of acrylic acid. The second polymer is a water soluble cationic polymer composed of at least 20 mole percent of a cationic monomer represented by the formula: ##STR1## where R.sub.4 is either hydrogen or CH.sub.3 ; R.sub.5 and R.sub.6 are each an alkyl group having 1 to 2 carbon atoms; R.sub.7 is a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; A.sub.2 is either an oxygen atom or NH; B.sub.2 is either an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group and X.sub.2.sup.- is an anionic counterion.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: October 17, 2000
    Assignee: Nalco Chemical Company
    Inventors: John R. Hurlock, Manian Ramesh
  • Patent number: 6133339
    Abstract: The invention describes a transparent, elastomeric dental cement composition suitable for temporary or provisional restorations that comprises: (a) at least one multifunctional oligomer or prepolymer as a binder; (b) at least one finely divided filler; and (c) at least one initiation system for polymerization. The cement has a high translucency which does not alter the color shade of a temporary prosthesis or appliance and great flexibility which allows the dentist to remove the temporary appliance easily and clean both the temporary appliance and the dental tissues easily. The invention also describes a method of using the transparent, elastomeric dental cement.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: October 17, 2000
    Assignee: Kerr Corporation
    Inventors: Xiaoyi Xie, Duncan E. Waller