Patents Examined by Wu C. Cheng
  • Patent number: 6103845
    Abstract: Copolymers and terpolyers are used in chemically amplified resists. The terpolymers are of the formula: ##STR1## wherein R.sub.3 is selected from the group consisting of hydrogen and a C.sub.1 to C.sub.10 aliphatic hydrocarbon, wherein the aliphatic hydrocarbon contains substituents selected from the group consisting of hydrogen, hydroxy, carboxylic acid, carboxylic anhydride, and combinations thereof; R.sub.4 is selected from the group consisting of hydrogen and a C.sub.1 to C.sub.10 aliphatic hydrocarbon, wherein the aliphatic hydrocarbon contains substituents selected from the group consisting of hydrogen, hydroxy, carboxylic acid, carboxylic anhydride, and combinations thereof; R.sub.5 is selected from the group consisting of hydrogen and methyl; R.sub.6 is selected from the group consisting of t-butyl and tetrahydropyranyl; m and n are each integers; and wherein n/(m+n) ranges from about 0.1 to about 0.5.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: August 15, 2000
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-jun Choi, Chun-geun Park, Young-bum Koh
  • Patent number: 6051670
    Abstract: A gelling composition and a process for using the gelling composition for oilfield applications are provided. The gelling composition comprises a water-soluble polymer, a crosslinking agent, and a liquid wherein the water-soluble polymer comprises repeat units derived from a nitrogen-containing olefinic monomer and optionally an olefinic comonomer. The gelling composition can be used in drilling fluids, workover fluids, completion fluids, permeability corrections, water or gas coning prevention, fluid loss prevention, matrix acidizing, fracture acidizing, and combinations of any two or more thereof.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: April 18, 2000
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Ahmad Moradi-Araghi, Aly-Anis Hamouda, Odd Ivar Eriksen
  • Patent number: 6011103
    Abstract: A process for preparing an aqueous dispersion of a cationic fine grain gel, comprising microemulsion polymerizing (polymerizing in microemulsions) an unsaturated monomer M under the presence of a polymer P which contains 30 to 92.5% by mole of a nonionic structure unit (a) and 70 to 7.5% by mole of a quaternary ammonium group-containing structure unit (b), and which contains the specific amount of a specific structure unit (b.sub.1) having a quaternary ammonium group and a polymerizable double bond, and an aqueous dispersion of a cationic fine grain gel obtainable by the process.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: January 4, 2000
    Assignee: Arakawa Kagaku Kogyo Kabushiki Kaisha
    Inventor: Tetsuya Inoue
  • Patent number: 5985522
    Abstract: There is provided a photoresist including (a) a resin composed of a polymer having a compound represented with the following general formula [1] within a structural unit thereof, and (b) a photo acid generator. ##STR1## wherein R.sup.1 represents a hydrogen atom, R.sup.2 represents a divalent hydrocarbon group including a bridged cyclic hydrocarbon group and having a carbon number in the range of 7 to 13 both inclusive, R.sup.3 and R.sup.4 represent a hydrocarbon group having a carbon number of 1 or 2, and R.sup.5 represents one of (a) a hydrocarbon group having a carbon number of 1 to 12, (b) a hydrocarbon group having a carbon number of 1 to 12 and replaced with an alkoxy group having a carbon number of 1 to 12, and (c) a hydrocarbon group having a carbon number of 1 to 12 and replaced with an acyl group having a carbon number of 1 to 13. The above mentioned photoresist produces no extra polymer by side reaction.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: November 16, 1999
    Assignee: NEC Corporation
    Inventors: Shigeyuki Iwasa, Kaichiro Nakano, Katsumi Maeda, Takeshi Ohfuji, Etsuo Hasegawa
  • Patent number: 5962613
    Abstract: Water-soluble copolymers which are obtainable by free-radical solution polymerization ofa) 10-99.5% by weight of at least one vinylimidazole of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are identical or different and are H, C.sub.1 -C.sub.4 -alkyl, monomers of the formula ##STR2## where R.sup.4 and R.sup.5 are identical or different and are H, C.sub.1 -C.sub.4 -alkyl or together form a ring of 3 to 5 methylene groups,N-vinyloxazolidone, N-vinyltriazole, 4-vinylpyridine N-oxide or mixtures of said monomers,b) 0-89.5% by weight of other copolymerizable monoethylenically unsaturated monomers andc) 0.5-30% by weight of at least one monomer which acts as crosslinker and has at least two non-conjugated ethylenic double bondsin water and/or polar organic solvents in the presence of polymerization regulators, using from 0.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: October 5, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Schade, Jurgen Detering, Stefan Stein, Dieter Boeckh, Hans-Ulrich Jager
  • Patent number: 5942573
    Abstract: Provided by this invention are an acrylamide polymer which has a weight-average molecular weight (a) of from 1,500,000 to 10,000,000 and a weight-average inertial radius (b) of from 30 to 150 nm, the ratio (b)/(a) of the weight-average inertial radius (b) to the weight-average molecular weight (a) being 0.00004 or smaller; and an aqueous solution of an acrylamide polymer which solution has a polymer concentration ranging from 22 to 60%, a Brookfield viscosity at 25.degree. C. of 50,000 cps or smaller and a weight-average molecular weight of from 500,000 to 10,000,000. They are useful as paper strength agents.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: August 24, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hirotoshi Doki, Hitoshi Ishigaki, Toshiki Oyanagi, Tsugio Matsubara, Shigeo Watanabe
  • Patent number: 5932674
    Abstract: The invention relates to a novel process for the production of mouldings, in particular contact lenses, in which a soluble prepolymer comprising units containing a crosslinkable group and at least one unit containing a modifier is crosslinked in solution, and to mouldings, in particular contact lenses, obtainable by this process. The present invention likewise relates to novel prepolymers which can be employed in the novel process, in particular derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 which comprises from about 0.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: August 3, 1999
    Assignee: Novartis AG
    Inventor: Beat Muller
  • Patent number: 5929182
    Abstract: Novel sulfur, oxygen and nitrogen-containing heterocyclic monomers are provided which may be used to produce conductive graft copolymers.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: July 27, 1999
    Assignee: Adhesives Research, Inc.
    Inventor: Michael J. Zajaczkowski
  • Patent number: 5929175
    Abstract: This invention relates to dye complexing polymers, and, more particularly, to water soluble poly(vinylpyridine betaines) containing a quaternary nitrogen and a carboxylate salt. The polymers herein have effective dye transfer inhibitor (DTI) properties for use, for example, laundry detergent and fabric softener compositions.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: July 27, 1999
    Assignee: ISP Investments Inc.
    Inventors: Jenn S. Shih, Bala Srinivas, John C. Hornby
  • Patent number: 5919880
    Abstract: A compound represented by the following formula 1: ##STR1## wherein R.sub.1 is an unsubstituted or substituted benzyl group or unsubstituted or substituted phenyl group, method for producing a copolymer comprising copolymerizing a monomer mixture containing the compound, copolymer for lenses containing a copolymerized component represented by the following formula 2 ##STR2## and a lens consisting of the copolymer. The compound of the formula 1 is a reactive dye exhibiting excellent hydrolysis resistance, good copolymerizability with other comonomers, excellent dyeing property and proper solubility in comonomers.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: July 6, 1999
    Assignee: Hoya Corporation
    Inventors: Suguru Imafuku, Soichiro Motono, Hidetoshi Iwamoto
  • Patent number: 5916986
    Abstract: A sterically-hindered monomer is used to make a polymer which in turn is useful in coating compositions. The resulting residue of the sterically-hindered monomer is present in the polymer, as well as in a cured coating (preferably an automotive coating) produced using a coating composition having the polymer therein. The presence of the residue of the sterically-hindered monomer imparts in the cured coating a resistance to environmental etching.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: June 29, 1999
    Assignee: BASF Corporation
    Inventors: Anna M. Budde, James A. Laugal, Walter H. Ohrbom, Marvin L. Green, Mark R. Montagne
  • Patent number: 5912381
    Abstract: A compound having the formula:((CH.sub.2 .dbd.CR.sup.1 --C(O)O--) .sub.x R.sup.2 --(O--C(O)R.sup.3).sub.y --O--C(O)).sub.n --R.sup.4 --(C(O)OM) .sub.mwherein:R.sup.1 is hydrogen or methyl,R.sup.2 is an alkylene group or substituted alkylene group (typically having less than six carbon atoms, more typically two or three carbon atoms),R.sup.3 is an alkylene group or substituted alkylene group (typically having less than ten carbon atoms, more typically from four to six carbon atoms),R.sup.4 is an aromatic radical (e.g. the residue of an aromatic polycarboxylic polyanhydride having a functionality of one half the sum of n and m),n and m are integers from two to four (typically two or three),x is an integer from one to three, andy is an integer from one to five.Among the compounds which fall within the above formula are those in which R.sup.1 is hydrogen, R.sup.2 is an ethylene group, R.sup.3 is a pentamethylene group, and R.sup.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: June 15, 1999
    Assignee: Henkel Corporation
    Inventors: Ramesh Narayan, Miguel A. Dones, Michael McDermott
  • Patent number: 5910551
    Abstract: A method for preparing polymerized libraries of polymerizable cyclodextrin derivatives (PCDs) for use in dental and other applications is disclosed. This is done by first preparing PCDs that are mixtures of reaction products resulting from reacting a cyclodextrin with a sufficient number of moles of reagents that will, with high probability, covalently attach one or more polymerizable groups on substantially every cyclodextrin molecule. These reactions are carried out in the presence of solvents and catalysts, and the reaction products are formulated with compatible comonomers to the desired viscosity. The resulting formulations(s) is (are) combined with one or more polyemerization initiators, and the polymerization initiators are activated to form one or more polymerized cyclodextrin libraries.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: June 8, 1999
    Assignee: American Dental Association Health Foundation
    Inventor: Rafael L. Bowen
  • Patent number: 5908907
    Abstract: An aqueous emulsion comprising at least one (co)polymer is provided. The (co)polymer is derived from a monomer having formula (1):(R.sub.1 R.sub.2 C.dbd.CR.sub.3 --CO--L--).sub.q A(--NCOblock).sub.p (1)wherein R.sub.1, R.sub.2, and R.sub.3, which are the same or different, represent a hydrogen or a group selected from hydrocarbon chains comprising 1 to 12 carbon atoms, halogens, and electron-withdrawing functional groups; L, which is the same or different, represents a divalent hydrocarbon radical comprising 2 to 12 carbon atoms; A represents an organic backbone which has n free valencies, n is a number between 2 and 7, and is equal to p+q; NCOblock represents a protected isocyanate functional group; p is a number between 1 and 6; and q is a number between 1 and 6.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: June 1, 1999
    Assignee: Rhone-Poulenc Chimie
    Inventors: Michel Desbois, Roland Reeb, Joel Richard, Francoise Truchet
  • Patent number: 5905128
    Abstract: This invention relates to (co)polymers which contain at least one repeat chain unit of the general formula (1) or (2) and optionally repeat units of the general formula (3), ##STR1## in which L.sup.1 and L.sup.2 denote a photoluminescent residue,wherein the proportion of structural units of the formulae (1) and/or (2) is in each case 0.5 to 100 mol. % and of (3) is 0 to 99.5 mol. % and the molar percentages add up to 100,to the use thereof for the production of electroluminescent arrangements and to the electroluminescent arrangements.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: May 18, 1999
    Assignee: Bayer AG
    Inventors: Yun Chen, Rolf Wehrmann, Andreas Elschner, Ralf Dujardin
  • Patent number: 5902853
    Abstract: A process for the preparation of resin particles comprising:adding a mixture of at least one free radical reactive monomer continuously to a heated aqueous solution of a water soluble free radical initiator and a water soluble salt to form latex emulsion particles and aggregates thereof; and wherein the rate of continuous addition of said monomer is greater than the rate at which monomer is consumed by polymerization.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: May 11, 1999
    Assignee: Xerox Corporation
    Inventors: Anthony J. Paine, Alfred Rudin, Florin Vlad
  • Patent number: 5891959
    Abstract: Anti-reflective coatings and methods for forming these anti-reflective coatings are disclosed that have a polymer chemistry and optical characteristics suitable for suppressing the light that reflects off a circuit substrate during a photo-lithographic process. These anti-reflective coatings include a phenolic polymer material and an epoxide-containing polymer material that can be combined in a select proportion to form a thermally curable polymeric anti-reflective coating. The select proportions of the combined materials tailors the optical characteristic of the anti-reflective coating to attenuate energy about a select range of wavelengths.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: April 6, 1999
    Assignee: Massachusetts Institute of Technology
    Inventor: Roderick R. Kunz
  • Patent number: 5891971
    Abstract: A process for the preparation of a resin comprising:heating a mixture of at least one free radical polymerizable monomer, a free radical initiator compound, a stable free radical compound, and a reducing agent.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: April 6, 1999
    Assignee: Xerox Corporation
    Inventors: Barkev Keoshkerian, Marion H. Quinlan, Michael K. Georges, H. Bruce Goodbrand
  • Patent number: 5889131
    Abstract: A side-chain type second-order nonlinear optical polymer compound having a repeating unit as represented in general structure (I), --(--MO--).sub.m --(--ITCN--NLO--).sub.n --, wherein the sum of m and n is from 5 to 10000 and m and n satisfy m/(m+n)=from 0.05 to 0.95; ITCN--NLO is ##STR1## X is not present, or represents alkylene having from 1 to 6 carbon atoms or aromatic hydrocarbon having from 6 to 12 carbon atoms; Y is a bonding group selected from the group consisting from ether, ester, amide, alkylamino having from 1 to 5 carbon atoms, carbamate and sulfone; NLO is a general second-order nonlinear optical chemical group in which a conjugated aromatic ring can be unsubstituted or substituted by an electron-donor and/or electron-acceptor; and MO is any polymerizable monomer copolymerizable with ITCN--NLO, and a nonlinear optical material prepared with the same arc disclosed.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: March 30, 1999
    Assignee: Korea Institute of Science and Technology
    Inventors: Nak Joong Kim, Dong Hoon Choi, Sang Yup Song
  • Patent number: 5889130
    Abstract: Cyclic amine monomers and polymers and N-halamine biocidal polymer compounds are provided. Methods of making and using the same wherein the functional groups unhalogenated or halogenated hydantoins, triazine diones, imidazolidinones, and pyrimidinones are substituted onto inexpensive polymer units such as polystyrene, polyethylene, and modified polymethacrylamide are provided. The cyclic amine monomers and polymers can be utilized to form the biocidal N-halamine polymers. These N-halamine polymers are stable, insoluble biocides which release only small amounts of free halogen and other impurities. They can be useful as disinfectants for potable water, swimming pools, hot tubs, industrial water systems, cooling towers, air-conditioning systems, gas streams, paints, oils, ointments, fabrics, rubber materials, sterile bandages, coatings, hard surfaces, liners of containers, and the like.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: March 30, 1999
    Assignee: Auburn University
    Inventors: Shelby D. Worley, Gang Sun, Wanying Sun, Tay-Yuan Chen