Patents Examined by Joseph L. Schofer
  • 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: 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: 5986150
    Abstract: To provide a fluorine-containing olefin represented, for example, by CH.sub.2 .dbd.CFCF.sub.2 --R.sub.f.sup.6 --(CH.sub.2).sub.k --X.sup.2 [wherein, X.sup.2 is ##STR1## R.sub.f.sup.6 is a fluorine-substituted fluorine-containing alkyl group having 1 to 40 carbon atoms or --OR.sub.f.sup.7 --(Rf.sup.7 is a fluorine-substituted fluorine-containing alkyl group having 1 to 40 carbon atoms or a fluorine-substituted fluorine-containing ether group having 3 to 50 carbon atoms), k is 0 or an integer of 1 to 6]; a fluorine-containing polymer with functional group which is prepared by polymerizing the above-mentioned olefin, has good affinity with various heat-resisting thermoplastic resins and is capable of forming homogeneous dispersion with the thermoplastic resin; and a thermoplastic resin composition comprising the above-mentioned fluorine-containing polymer with functional group and an aromatic polyester or the like as the heat-resisting thermoplastic resin.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: November 16, 1999
    Assignee: Daikin Industries, Ltd.
    Inventors: Takayuki Araki, Tetsuo Shimizu, Takafumi Yamato, Masahiro Kumegawa, Yoshihisa Yamamoto
  • Patent number: 5955556
    Abstract: The present invention provides a novel, optionally surfactant-free process for controlling particle number, particle size, and/or particle size distribution. The method of the invention also significantly improves monomer to polymer conversion rates, as well as, increases the level of polymer solids which can be emulsified/dispersed in water without polymer flocculation. Specifically, the improved process provides an aqueous dispersion of up to about 48% polymer solids in water in the absence of surfactant. The resulting fluoropolymers dispersions may be used in resin and coating applications.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: September 21, 1999
    Assignee: AlliedSignal Inc.
    Inventors: Thomas F. McCarthy, Yan Chen, Eric J. Rainal
  • Patent number: 5939501
    Abstract: The present invention provides a process for making fluorinated polymers and copolymers having stable end groups. The process includes (1) contacting a fluoromonomer, an initiator capable of producing stable end groups on the polymer chain, and a polymerization medium comprising carbon dioxide, and (2) polymerizing the fluoromonomer. The polymerization medium preferably comprises liquid or supercritical carbon dioxide. Advantageously, the process may also include the step of separating the fluoropolymer from the polymerization medium.The present invention also provides polymerization reaction mixtures useful in the processes of the present invention.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: August 17, 1999
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Joseph M. DeSimone, Timothy Romack
  • Patent number: 5939502
    Abstract: The present invention provides a process for making fluorinated polymers and copolymers having stable end groups. The process includes (1) contacting a fluoromonomer, an initiator capable of producing stable end groups on the polymer chain, and a polymerization medium comprising carbon dioxide, and (2) polymerizing the fluoromonomer. The polymerization medium preferably comprises liquid or supercritical carbon dioxide. Advantageously, the process may also include the step of separating the fluoropolymer from the polymerization medium. The present invention also provides polymerization reaction mixtures useful in the processes of the present invention.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: August 17, 1999
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Joseph M. DeSimone, Timothy Romack
  • Patent number: 5910554
    Abstract: A polymer useful as a solid support for a variety of applications is provided. The polymer is prepared from a composition comprising at least one type of olefinic monomer and a multifunctional (meth)acrylate crosslinker of the following formula (I): ##STR1## wherein: (a) R.sup.1, R.sup.2, and R.sup.3 are each independently hydrogen or a methyl group;(b) R.sup.4 is hydrogen or an organic group or substituent that can interact in the polymerization and/or crosslinking process or is nonreactive under the conditions of the polymerization and/or crosslinkling process;(c ) R.sup.7, R.sup.8, and R.sup.9 are each independently --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2, --CH.sub.2 --CH(CH.sub.3)--, or --CH(CH.sub.3)--CH.sub.2 --;(d) each of 1, m, and n is no greater than about 100 with the proviso that at least one of 1, m, or n is at least 1.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: June 8, 1999
    Assignee: Regents Of The University Of Minnesota
    Inventors: Maria Kempe, George Barany
  • Patent number: 5910549
    Abstract: An improved process for free radical polymerization is produced making it possible to control the growth steps of a polymerization to produce homopolymers and copolymers, including block and graft copolymers. The process uses a long half-life radical initiators and compounds which have the structure of formula I ##STR1## wherein X is a group having at least one carbon atom and is such that the free radical X is capable of polymerizing the unsaturated monomer by free radical polymerization, and the radical functionality resides on the or one of the carbon atoms, R.sup.1, R.sup.2, R.sup.5 and R.sup.6 represent the same or different straight chain or branched substituted or unsubstituted alkyl groups of a chain length sufficient to provide steric hindrance and weakening of the O--X bond, and R.sup.3 and R.sup.4 represent the same or different, straight chain or branched, substituted alkyl groups or R.sup.3 CNCR.sup.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: June 8, 1999
    Assignee: Carnegie-Mellon University
    Inventors: Krzysztof Matyjaszewski, Dorota Greszta
  • Patent number: 5891973
    Abstract: Disclosed herein is a game ball and method for making the same. The game ball has an ionomeric cover which includes a combination of ionomeric crosslinks and covalent crosslinks. The game ball cover is superior in at least one of cut resistance and scuff resistance to a conventional cover that does not have covalent crosslinks but is otherwise substantially identical in composition. The game ball cover of the invention is particularly useful for improving the durability of golf balls to be struck with sharp-grooved clubs.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: April 6, 1999
    Assignee: Lisco, Inc.
    Inventors: Michael J. Sullivan, Thomas Kennedy
  • Patent number: 5880213
    Abstract: An aqueous microemulsion polymerization procedure is described in which very small colloidal polymer particles are produced from tetrafluoroethylene monomer. The polymerization procedure involves forming a microemulsion of at least one liquid saturated organic compound; adding gaseous tetrafluoroalkyl monomer to the microemulsion; and initiating polymerization by adding a free-radical initiator to the mixture.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: March 9, 1999
    Inventors: Huey Shen Wu, Jack Hegenbarth, Chen Xin-Kang, Chen Jian-Guo
  • Patent number: 5877267
    Abstract: A method for polymerizing fluorine-containing ethylenically-unsaturated monomer and allylic-hydrogen containing olefin monomer is provided. The method involves the use of fluoroaliphatic-group containing sulfinate. Novel polymers are also disclosed, comprising interpolymerized units derived from tetrafluoroethylene and allylic-hydrogen containing olefin, for example, propylene.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: March 2, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael P. Greuel, Werner M. Grootaert
  • Patent number: 5874090
    Abstract: The subject invention pertains to a sustained-release formulation of d-threo-methylphenidate (dtmp). The subject invention also pertains to methods for treating disorders using a sustained-release formulation comprising d-threo-methylphenidate.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: February 23, 1999
    Assignee: Medeva Europe Limited
    Inventors: Helen Frances Baker, Julian Clive Gilbert
  • Patent number: 5872198
    Abstract: A suspension polymerization technique is provided for molecular imprinting based on the use of a perfluorocarbon liquid as the dispersing phase that does not interfere with the interactions between functional monomers and print molecules required for the recognition process during molecular imprinting, and provides controllable particle sizes within less than about 5 .mu.m to about 100 .mu.m.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: February 16, 1999
    Inventors: Klaus Mosbach, Andrew G. Mayes
  • Patent number: 5872287
    Abstract: Provided are an amphipathic compound represented by any of the following Formulas: ##STR1## (R.sub.1 is a linear or branched, saturated hydrocarbon group having 6 to 48 carbon atoms, or a linear or branched, unsaturated hydrocarbon group containing 1 to 12 unsaturated double bond and having 6 to 48 carbon atoms; Y is NH, N--(CH.sub.2 --CH.dbd.CH.sub.2), or O; Q is --CH.sub.2 --C(R.sub.2).dbd.CH.sub.2 or --R.sub.4 --O--CO--C(R.sub.2).dbd.CH.sub.2 ; and M is alkali metal, an ammonium group, or --(CH.sub.2 CH.sub.2 O).sub.m H), a copolymer of the amphipatic compound with a copolymerizable ethylenically unsaturated compound and, a paper making additive containing a water soluble or dispersible high molecular compound as an active ingredient and processes for producing these high molecular compounds.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: February 16, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Toshihiko Takaki, Masaru Tanabe, Hiroshi Itoh, Masayuki Yanagi, Shoko Oyanagi, Hiroyoshi Watanabe, Atsushi Utsunomiya, Yasuko Ono, Masanori Tsuchihashi
  • Patent number: 5872199
    Abstract: Copolymers prepared from novel alkyl polyglycoside maleic acid esters and vinyl monomers are biodegradable and repulpable and are useful in adhesives, coatings, sizing agents, toners, retention aids and related polymer resins in paper and paperboard applications, in wood gluing, packaging and other applications.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: February 16, 1999
    Assignee: Lions Adhesives, Inc.
    Inventors: Steven Bloembergen, Ian J. McLennan, Ramani Narayan
  • Patent number: 5866664
    Abstract: A process for efficiently utilizing phosphorous acid or salts thereof as a chain transfer agent in the polymerization of monomers, particulary unsaturated carboxylic acid monomers, is provided, where the polymerization is conducted at an in-process solids level of at least 40 percent and in-process neutralization level of at least 30% to produce low molecular weight water-soluble phosphonate-terminated polymers.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: February 2, 1999
    Assignee: Rohm and Haas Company
    Inventors: Thomas Francis McCallum, III, Barry Weinstein
  • Patent number: 5866166
    Abstract: A composition, comprising (a) microcrystalline cellulose; and (b) a compressibility augmenting agent which (i) physically restricts the proximity of the interface between adjacent cellulose surfaces; or (ii) inhibits interactions between adjacent cellulose surfaces; or (iii) accomplishes both (i) and (ii) above, is disclosed. The composition is in the form of agglomerated particles of microcrystalline cellulose and the compressibility augmenting agent in intimate association with each other.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: February 2, 1999
    Assignee: Edward Mendell Co., Inc.
    Inventors: John N. Staniforth, Bob E. Sherwood, Edward A. Hunter
  • Patent number: 5863987
    Abstract: An adhesion force between a polyester cord and adherend rubber is improved by an adhesive composition comprising vinylpyridine-styrene-butadiene copolymer latex particles having at least two kinds of monomer compositions and a thermosetting resin comprised of resol type condensate and novolak type condensate of resorcin-formaldehyde.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: January 26, 1999
    Assignee: Bridgestone Corporation
    Inventors: Masaaki Nakamura, Kozo Sasaki
  • Patent number: 5863664
    Abstract: A composition of matter includes a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester monomer, and 99 to 1 weight percent of a second monomer and an initiator therefor, the second monomer being the member of 1) or 2) that is not selected as the first monomer, wherein the curative for the cyanate ester is a transition metal-containing organometallic compound curing agent and the curative for the free-radically polymerizable monomer is a free-radical generating curing agent or a transition metal-containing organometallic compound.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: January 26, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Fred B. McCormick, David J. Drath, Ilya Gorodisher, Michael A. Kropp, Michael C. Palazzotto, Melville R. V. Sahyun
  • Patent number: RE36794
    Abstract: Group IV organometallic compounds, e.g. alkylsilane, or alkylsiloxane compounds, are used as chain transfer agent in the radical initiated polymerization of ethylenically unsaturated monomers, to give polymers comprising non-ionic end groups.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: July 25, 2000
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Werner M. Grootaert