Patents Examined by Wu C. Cheng
  • Patent number: 5856418
    Abstract: A water-soluble monomer is shown by general formula (1) below. This monomer, for example, can be obtained by reacting asparagic acid and maleic anhydride in an aqueous basic solution under cooled conditions. A water-soluble polymer has a structural unit of general formula (2) below and a weight-average molecular weight of about 800 to about 8,000,000, and is, for example, produced by polymerizing a monomer including the water-soluble monomer of general formula (1). The water-soluble polymer has excellent chelating and dispersing actions and therefore can favorably be used for various purposes, such as, detergent compositions, inorganic-pigment dispersants, fiber-treating agents, water-treating agents, wood pulp-bleaching assistants.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: January 5, 1999
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Yoshihiro Maeda, Shigeru Yamaguchi
  • Patent number: 5856407
    Abstract: A bimodal, crosslinked toner resin can be prepared in non-aqueous solvent, e.g., toluene, using standard solution polymerization techniques. The resin-forming process prepares a precursor resin from ethylenically unsaturated monomer(s), and then grafts maleic anhydride onto the precursor resin to form a modified precursor resin. The modified precursor resin is reacted with a polyfunctional molecule, e.g. a diol, to provide a crosslinked resin. The process is preferably conducted in the presence of a low molecular weight polymeric additive, e.g., polystyrene, to provide a bimodal as well as crosslinked toner resin composition. With the addition of a colorant, a toner powder may be formed.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: January 5, 1999
    Assignee: Image Polymers Company
    Inventor: Francis L. Chupka, Jr.
  • Patent number: 5855244
    Abstract: A water-soluble polymer and a process for using the polymer for applications in a subterranean formation are provided. The polymer comprises repeat units derived from a nitrogen-containing olefinic monomer and optionally an olefinic comonomer. The polymer 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: September 30, 1997
    Date of Patent: January 5, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Iqbal Ahmed, Ahmad Moradi-Araghi, Aly-Anis Hamouda, Odd Ivar Eriksen
  • Patent number: 5854364
    Abstract: At least one of the monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature which may be as low as 0.degree. C., in the presence of at least one radical-generator compound and at least one metal complex catalyst of formula Ma.sub.a (L).sub.n (M=Cu, Ag or Au; A=Hal, pseudohalogen or carboxylate; L=ligands of M chosen from those of formula ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 =H, C.sub.1 -C.sub.10 alkyl, aromatic or heteroaromatic; Z.sup.1, Z.sup.2 and Z.sup.3 =one of the following: ##STR2## (R.sup.7 to R.sup.18 =H, C.sub.1 -C.sub.10 alkyl, aromatic or heteroaromatic; R.sup.19 and R.sup.20 =H, Hal, C.sub.1 -C.sub.10 alkyl, C.sub.1 -C.sub.10 alkoxy or --(CR.sup.21 R.sup.22)rNR.sup.23 R.sup.24, where R.sup.21, R.sup.22, R.sup.23 and R.sup.24 =H,C.sub.1 -C.sub.10 alkyl, aromatic or heteroaromatic, and r=integer from 1 to 10; it being possible also for not more than two from among Z.sup.1, Z.sup.2 and Z.sup.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: December 29, 1998
    Assignee: Elf Atochem S.A.
    Inventors: Thierry Senninger, Laurent Sanchez, Vincent Darcos, Dominique Lastecoueres, Jean-Baptiste Verlhac
  • Patent number: 5854303
    Abstract: A polymeric material incorporating a polyvalent cation chelating agent in an amount effective to inhibit the growth of an ocular pathogen, particularly a protozoan, can be used to produce eye care products such as contact lens cases and containers for containing eye care solutions and contact lenses.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: December 29, 1998
    Assignee: Allergan Sales, Inc.
    Inventors: Charles Hayes Powell, David C. Rupp
  • Patent number: 5852126
    Abstract: The invention is directed to compositions containing at least one olefinic monomer, at least one polymer prepared form an olefinic monomer, an indicator dye to the basic structure of which an olefinic polymerisable group is covalently bonded directly or via a bridge group, at least one diolefinic cross-linking agent, and an effective amount of a polymerisation initiator; to polymerisates of the compositions, the polymerisates being in the form of interpenetrating networks; to membranes and unsupported films prepared from the polymerisates; to carrier materials coated with the compositions and polymerisates; to optical sensors prepared from the polymerisates; and to methods of determining ions and/or gases in solutions and/or blood.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: December 22, 1998
    Assignee: Novartis AG
    Inventors: Steven Barnard, Marizel Rouilly
  • Patent number: 5849841
    Abstract: The invention relates to a novel process for the production of mouldings, in particular contact lenses, in which a water-soluble, crosslinkable polymer is crosslinked in solution, and to mouldings, in particular contact lenses, obtainable by this process. The present invention likewise relates to novel water-soluble, crosslinkable polymers, in particular those comprising units of formula (III or IIIa), in which R.sub.1 and R.sub.2, independently of one another, are hydrogen, a C.sub.1 -C.sub.8 alkyl group, an aryl group or a cyclohexyl group, where these groups can be monosubstituted or polysubstituted, R.sub.3 is hydrogen or a C.sub.1 -C.sub.4 alkyl group, and R.sub.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: December 15, 1998
    Assignee: CIBA Vision Corporation
    Inventors: Andreas Muhlebach, Beat Muller
  • Patent number: 5847060
    Abstract: This invention relates to the controlled molecular weight production of macromonomers and polymers with terminal conjugated double bonds from starting monomers including, but not limited to substituted butadienes. The terminal diene end thus produced is also a potential reaction site for further polymerization or functionalization. The molecular weight is controlled by use of Co chain transfer catalysts and appropriate process conditions.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: December 8, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Alexei Alexeyevich Gridnev, Steven Dale Ittel
  • Patent number: 5840819
    Abstract: The process for the manufacture of (co)polymer powders by aqueous suspension polymerization of at least one monomer which is polymerizable in suspension is conducted in the presence of at least one free-radical generator as catalyst, of at least one dispersing agent and, in addition, of at least one inhibitor scavenging free radicals of at least one complexing agent.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: November 24, 1998
    Assignee: Elf Atochem S.A.
    Inventor: Michel Biensan
  • Patent number: 5837789
    Abstract: The present invention relates to superabsorbent cross-linked polymers for watery liquids, which are built-up of partially neutralized monomers having monoethylenlcally unsaturated acid groups, optionally further monomers copolymerizable therewith, as well as polymers optionally suitable as graft basis, and which can be manufactured by using a cross-linker/monomer combination ofCH.sub.2 .dbd.CHR.sup.6 --CO--(OCHR.sup.3 --CHR.sup.3).sub.z O--CH.sub.2 --CHR.sup.6 .dbd.CH.sub.2CH.sub.2 .dbd.CHR.sup.6 --R.sup.5 --(OCHR.sup.3 --CHR.sup.3).sub.v OR.sup.4R.sup.1 --?O(CHR.sup.3 --CHR.sup.3 O).sub.u --CO--R.sup.2 !.sub.x, and/or di- or triallylamine and/or bisacrylamidewithR.sup.1 : multivalent C2-10-alkyl,R.sup.2 : linear or branched C2-10-alkenyl,R.sup.3 : H, CH.sub.3, C.sub.2 H.sub.5,R.sup.4 : H, linear or branched C1-10-alkyl,R.sup.6 : CO, CH.sub.2R.sup.8 : H, CH.sub.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: November 17, 1998
    Assignee: Stockhausen GmbH & Co. KG
    Inventors: Dolf Stockhausen, Hans-Georg Hartan, Helmut Brehm, Gerd Jonas, Bernfried Messner, Klaus Pflueger
  • Patent number: 5834531
    Abstract: Radiation-sensitive compositions comprising a substance which forms acid under the action of actinic radiation and polymers based on combination of different repeating units derived from hydroxy styrene and hydroxy-vinylcyclohexane derivatives wherein a portion of the hydroxyl groups are replaced with either acid-labile acetal or ketal protecting groups and where a portion of the repeating groups comprise two crosslinked species connected via the protecting groups.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: November 10, 1998
    Assignee: Olin Microelectronic Chemicals, Inc.
    Inventors: Hans-Thomas Schacht, Norbert Muenzel, Carl-Lorenz Mertesdorf, Pasquale Alfred Falcigno, Heinz Holzwarth, Ottmar Rohde, deceased, Hans-Jorg Kirner
  • Patent number: 5830966
    Abstract: Compounds of general formula (I) ##STR1## characterised in that R.sup.1 and R.sup.2 are independently selected from the group consisting of COOR, CN, aryl, substituted aryl, COOH, halogen, C(O)NHR.sup.4, C(O)NR.sup.5 R.sup.6 ;X and Y are independently selected from the group consisting of H, COOH, COOR, CN, R.sup.3 CO--, C(O)NHR.sup.4, C(O)NR.sup.5 R.sup.6, P(O)(OR.sup.7).sub.2 and SO.sub.2 R.sup.8 ; with the proviso that X and Y are not both H; or X and Y together with the carbon atom to which they are attached form a carbocyclic or heterocyclic ring system which can contain oxygen, sulfur or nitrogen atoms; and R, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are various groups;and polymers and copolymers derived from such compounds.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: November 3, 1998
    Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific & Industrial Research Organisation
    Inventors: San Hoa Thang, Ezio Rizzardo, Graeme Moad
  • Patent number: 5830362
    Abstract: It concerns a monomer, a polymer obtained from the monomer and a process for obtaining the said polymer. The monomer consists of a polyether containing at least 3 ether units and pyrrole or thiophene units bonded to the ends of the chains of this polyether via, for each of these heterocycic compounds, either their carbon atoms in the 3,3'-positions of their heterocycles or, as regards more particularly the pyrrole groups, via their respective nitrogen atoms, the 2- and 2'-positions of these heterocycles being, however, free of all substitutions or, at the very most, substituted by easily removable groups (protective groups, for example).Application to the purification and recovery of metal ions such as radioactive silver.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: November 3, 1998
    Assignee: Electricite de France -- Service National
    Inventor: Olivier Leclerc
  • Patent number: 5830964
    Abstract: This invention relates to substantially colorless and odorless vinyl lactam polymers containing less than 100 ppm residual vinyl pyrrolidone and less than 1000 ppm vinyl caprolactam monomers and to the process for producing said polymers in the above state of purity which comprises contacting a vinyl pyrrolidone and/or vinyl caprolactam polymer containing excessive residual monomer with between about 0.1 and about 9 wt. % of porous resin having a sulfonic and/or carboxylic functionality wherein said resin has a particle size between 5 and 500 mesh.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: November 3, 1998
    Assignee: ISP Investments Inc.
    Inventors: Kou-chang Liu, Lowell R. Anderson, Rajiv Ginde, Colleen M. Rocafort
  • Patent number: 5830961
    Abstract: Polyacrylates based on alkyl acrylates or alkyl alkylacrylates or mixtures thereof as monomers are prepared in the presence of an initiator composition containing an alkali metal ester enolate and an organic aluminum compound or a mixture thereof, by a process in which an ester which differs from the monomers is present in the initiator composition, the carbon atom .alpha. to the ester group having no acidic proton.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: November 3, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Jungling, Christof Mehler, Helmut Schlaad, Bardo Schmitt, Axel Mueller, Horst Weiss, Susanne Steiger
  • Patent number: 5827911
    Abstract: Colored thermoplastic resin composition comprising a transparent thermoplastic resin and a black dye contained therein, wherein said black dye is a black dye obtained by reaction of at least one anionic surfactant selected from the group consisting of(a) sulfuric acid ester-series surfactants,(b) phosphoric acid ester-series surfactants,(c) sulfonic acid-series surfactants and(d) carboxylic acid-series surfactants, and nigrosine.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: October 27, 1998
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Akihiko Hayashi, Masataka Nishikawa
  • Patent number: 5824756
    Abstract: Described are preferred processes for producing linear polyvinylpyridines. The processes involve the use of hydrogen peroxide to initiate polymerization of vinylpyridine monomers in an aqueous solvent. Processes of the invention provide good reaction rates and conversions, and are particularly advantageous in achieving control of the M.sub.w 's of the final product polymers.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: October 20, 1998
    Assignee: Reilly Industries, Inc.
    Inventors: Eric F. V. Scriven, James R. Stout, Ramiah Murugan, James G. Keay
  • Patent number: 5821312
    Abstract: The present invention includes polymerizable monomers comprising an acid-functionalized glycoside moiety. The monomer can have a polymerizable functional group, such as an olefinic bond, to which the acid-functionalized glycoside moiety is attached by a spacer group, for example, an alkylene group, or an alkylene group wherein one or more carbon atoms are substituted by heteroatoms, such as oxygen, nitrogen or sulfur atoms. The present invention also includes polymers comprising pendant acid-functionalized glycoside moieties. The present invention also provides a method for treating a microbial infection in a mammal by administering to the mammal a therapeutically effective amount of a polymer comprising one or more acid-functionalized glycoside moieties.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: October 13, 1998
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: W. Harry Mandeville, III, Venkata R. Garigapati
  • Patent number: 5821313
    Abstract: A process for preparing nitrogen-containing copolymers useful as dispersant-viscosity improvers for lubricating oil compositions, additive concentrates and lubricating oil compositions are described.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: October 13, 1998
    Assignee: The Lubrizol Corporation
    Inventors: Matthew R. Sivik, Charles P. Bryant
  • Patent number: 5817726
    Abstract: A substantially non-crosslinked water-absorptive soft ocular lens material obtained by polymerizing polymerizable components comprising a methoxysilane compound (A) of the formula (I):X--Z--Si(OCH.sub.3).sub.n (R.sup.1).sub.3-n (I)wherein X is a (meth)acryloyloxy group, a vinyl group, a group of the formula ##STR1## or an allyl group, Z is a direct bond or a C.sub.1-3 alkylene group, R.sup.1 is a C.sub.1-6 alkyl group, and n is an integer of from 1 to 3, and a hydrophilic monomer (B) which has an unsaturated double bond copolymerizable with the methoxysilane compound (A) and which undergoes no crosslinking reaction, in an amount of at least 45 mol %.
    Type: Grant
    Filed: September 10, 1996
    Date of Patent: October 6, 1998
    Assignee: Menicon Co., Ltd.
    Inventors: Kazuhiko Nakada, Noriko Yoshimatsu, Shoji Ichinohe, Toshio Yamazaki