Patents Examined by Donald R. Wilson
  • Patent number: 6759485
    Abstract: A network consisting essentially of poly(propylene fumarate) cross linked with diacrylate and a method for making same.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: July 6, 2004
    Assignee: William Marsh Rice University
    Inventors: Shulin He, Michael J. Yaszemski, Antonios G. Mikos
  • Patent number: 6713141
    Abstract: A low-molecular-weight copolymer of tetrafluoroethylene with units of perfluoro alkyl vinyl ethers having a melt index of ≧30 suitable as a mixing component with a higher-molecular-weight copolymer of the same monomers for producing moldings in injection molding or by extrusion.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: March 30, 2004
    Assignee: 3M Innovative Properties Companyz
    Inventors: Ralph Kaulbach, Friedrich Kloos, Gernot Löhr, Peter Stamprech
  • Patent number: 6713562
    Abstract: Soft resin compositions comprising a polyethylene resin (A) and an ethylene/&agr;-olefin random copolymer (B) comprising ethylene and an &agr;-olefin having 3 to 20 carbon atoms at a specific proportion, or an ethylene/&agr;-olefin copolymer resin composition comprising a linear ethylene/&agr;-olefin copolymer (A-&agr;) comprising ethylene and an &agr;-olefin having 4 to 20 carbon atoms and a long-chain branched ethylene/&agr;-olefin random copolymer (B-&agr;) comprising ethylene and an &agr;-olefin having 3 to 20 carbon atoms in a specific proportion, wherein a density and MFR of the polyethylene resin (A) and the copolymer (A-&agr;), and a density, MFR, intrinsic viscosity, glass transition temperature, crystallinity, molecular weight distribution, B value and g&eegr;* values of the copolymers (B) and (B-&agr;) are each in a specific range.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: March 30, 2004
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Mamoru Kagami, Yasuo Tanaka, Masahiro Sugi
  • Patent number: 6710105
    Abstract: Curable epoxy resin compositions comprising (a) an epoxy resin having on average more than one epoxide group in the molecule, (b) an epoxy resin curing agent in an amount sufficient for full curing of the epoxy resin, (c) wollastonite having an average particle size of less than 100 &mgr;m in an amount of 10 to 350 parts by weight per 100 parts by weight of the sum of components (a) and (b), (d) a quartz/kaolinite mixture having an average particle size of less than 100 &mgr;m in an amount of 10 to 350 parts by weight per 100 parts by weight of the sum of components (a) and (b), the content of components (c) and (d) together not being greater than 360 parts by weight, and, if appropriate, (e) customary additives, are suitable for the production of mouldings having high-glass surfaces.
    Type: Grant
    Filed: January 5, 1998
    Date of Patent: March 23, 2004
    Inventors: Jens Awe, Helmut Beer, Wilhelm Endlich
  • Patent number: 6699944
    Abstract: An acrylic rubber composition providing crosslinked products of good handleability and good characteristics is provided. The acrylic rubber composition comprises the following two components: (A) an acrylic polymer having at least one active halogen represented by the formula (1) at a main terminus: —CH2—C(R1)(R2)(X)  (1) wherein R1 and R2 are the same or different and each represents a hydrogen atom or univalent organic group derived from a group bonded to a vinyl group of a main chain-constituting vinyl monomer and X represents chlorine, bromine or iodine; and (B) a crosslinking agent.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: March 2, 2004
    Assignee: Kaneka Corporation
    Inventors: Masayuki Fujita, Yoshiki Nakagawa
  • Patent number: 6693164
    Abstract: The invention relates to high purity fluoropolymers and processes for making such materials. These polymers are particularly suited for applications in the semiconductor industry. The process comprises removal of unstable polymer end groups by fluorination and removal of heavy metal impurities by extraction with an aqueous acid medium.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: February 17, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Thomas J. Blong, Denis Duchesne, Gernot Loehr, Albert Killich, Tilman Zipplies, Ralph Kaulbach, Herbert Strasser
  • Patent number: 6667031
    Abstract: A new adhesive method using an adhesive composition including cyanoacrylate adhesive and a stabilizing agent to join together portions of a substrate, particularly useful in suturing and similar medical procedures, is disclosed. It is based on the discovery that remarkable improvements are obtained by adding a step of removing stabilizing agent from such adhesive compositions in the manufacturing process with the prior known steps of (a) providing an adhesive composition including cyanoacrylate adhesive and a stabilizing agent, (b) presenting a substrate to receive at least a portion of such cyanoacrylate adhesive and (c) applying such portion to the substrate. Devices for use in performing the method are described.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: December 23, 2003
    Assignee: Spartan Products, Inc.
    Inventor: Max Azevedo
  • Patent number: 6667377
    Abstract: This invention concerns ionomers comprising monomer units of vinylidene fluoride and monomer units of perfluorovinyl ethers having pendant groups containing fluoroalkyl sulfonyl methide or fluoroalkyl sulfonyl imide derivatives and univalent metal salts thereof, and with the uses of said ionomers in eledrochemical applications, electrochemical capacitors and modified electrodes.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: December 23, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Andrew Edward Feiring, Christopher Marc Doyle, Mark Gerrit Roelofs, William Brown Farnham, Paul Gregory Bekiarian, Hanne A. K. Blau
  • Patent number: 6664337
    Abstract: A melt-processable fluorine-containing polymer is melt kneaded with a kneader which has a residence time of at least 10 minutes, a usable volume ratio (usable space in a container/space in a container) of larger than 0.3, and a power factor K of less than 8000, the power factor K being represented by the formula: K=Pv/&mgr;/n2 in which Pv is a power requirement per unit volume (W/m3), &mgr; is a melt viscosity (Pa.s), and n is a rotation speed (rps), to effectively remove terminal groups and bonds in the backbones, which are unstable during melt kneading, from the melt-processable fluorine-containing polymer, and obtain a colorless fluorine-containing polymer.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: December 16, 2003
    Assignee: Daikin Industries, Ltd.
    Inventors: Yoshiyuki Hiraga, Tomohisa Noda, Hiroyuki Imanishi, Satoshi Komatsu
  • Patent number: 6657008
    Abstract: Flame retardant resin composition comprising (a) an SPS, (b) a thermoplastic resin having a reactive polar group, (c) a compatibilizing agent having compatibility with the component (a) and a polar group capable of reacting with the component (b), (d) a flame retardant and (e) a flame retardant auxiliary, a weight ratio of the component (a)/the component (b) being less than 1.5, the amount of the component (c) being in the range of 0.5 to 10% by weight with respect to 100% by weight of the total of the components (a), (b) and (c), the amount of the component (d) being 10 parts by weight or more and the amount of the component (e) being 3 parts by weight or more with respect to 100 parts by weight of the total of the components (a), (b) and (c).
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: December 2, 2003
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Tohru Iwashita, Shinichi Miura
  • Patent number: 6635715
    Abstract: Improved thermoplastic polymer blend compositions comprising an isotactic polypropylene component and an alpha-olefin and propylene copolymer component, said copolymer comprising crystallizable alpha-olefin sequences. In a preferred embodiment, improved thermoplastic polymer blends are provided comprising from about 35% to about 85% isotactic polypropylene and from about 30% to about 70% of an ethylene and propylene copolymer, wherein said copolymer comprises isotactically crystallizable propylene sequences and is predominately propylene. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and improved process characteristics, e.g., a single melting point.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: October 21, 2003
    Inventors: Sudhin Datta, Avinash Chandrakant Gadkari, Charles Cozewith
  • Patent number: 6627696
    Abstract: There is provided a dispersion composition which has excellent dispersion stability and hardly sediments even after a long-term storage. This dispersion composition is a composition comprising a particulate material dispersed in an organic solvent, wherein a graft copolymer which has a particle diameter of 0.01-1 &mgr;m and self-disperses in said organic solvent is adsorbed to at least a part of the outer surface of said particulate material and a graft chain of said graft copolymer comprises a polysiloxane and an alkylene group of 1-18 carbon atoms.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: September 30, 2003
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Nagayuki Takao, Miyuki Nishimura
  • Patent number: 6617420
    Abstract: A method for residual monomer diminution by which a residual monomer is speedily removed from an N-vinyl compound polymer or the like without posing a problem such as an increase in ash content; and a process for producing an N-vinyl compound polymer solution or powder which has a regulated pH and is free from a decrease in pH with time. The method comprises adding an organic acid having a boiling point of 140° C. or higher at ordinary pressure to an aqueous solution of an N-vinyl compound polymer. The process comprises adding an organic base to an aqueous N-vinyl compound polymer solution having a pH lower than 7.0 to thereby neutralize the solution and regulate the pH thereof. Those operations are conducted in a reaction vessel in which a gaseous phase is regulated so as to have an oxygen concentration of 5.0% by volume or lower.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: September 9, 2003
    Assignees: Nippon Shokubai Co., Ltd., Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Toshiaki Kuriyama, Yasuko Inui
  • Patent number: 6605693
    Abstract: The invention relates to conjugated polymers containing triptycene units. The polymers according to the invention are on the one hand homopolymers comprising a recurring unit containing a triptycenylene radical, and copolymers comprising two or more different recurring units, which may contain a triptycenylene radical or an arylene, heteroarylene, vinylene and ethynylene radical. The polymers according to the invention are employed as electroluminescent materials.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: August 12, 2003
    Assignee: Covion Organic Semiconductors GmbH
    Inventors: Heinrich Becker, Willi Kreuder, Josef Salbeck, Karl Heinz Weinfurtner
  • Patent number: 6596822
    Abstract: The invention relates to a method and an apparatus for the polymerization of gaseous olefins, in particular of ethylene and at least one &agr;-olefin, in the gas phase in a stirred or fluidized, catalyst-containing polymerization zone (2) and at least one decompression zone (6, 10) downstream of the polymerization zone (2). The mixture of solid (co)polymer and unreacted monomers leaving the polymerization zone (2) flows through a settling zone, in particular in the form of a settling leg (14), before the decompression zone.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: July 22, 2003
    Assignee: Basell Polyolefine GmbH
    Inventors: Michael Witt, Andreas Deckers, Farid Rizk, Kaspar Evertz
  • Patent number: 6576704
    Abstract: The method of treating a saponified ethylene vinyl acetate copolymer (A) with an acid (B) and/or its salt (C) which comprises feeding a saponified ethylene-vinyl acetate copolymer (A′) in which the acid (B) and/or salt (C) has been incorporated in advance to a column reactor from its top, simultaneously feeding an aqueous solution of the acid (B) and/or salt (C) from the bottom of the reactor to thereby effect a countercurrent contact of (A′) with the aqueous solution of (B) and/or (C), withdrawing the excess of the aqueous solution of acid (B) and/or salt (C) from the reactor top, and continuously withdrawing the treated saponified ethylene-vinyl acetate copolymer from the reactor bottom.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: June 10, 2003
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiharu Nagao, Youichi Neki, Masahiko Taniguchi, Kenji Ninomiya
  • Patent number: 6475543
    Abstract: Use of a pigment of the formula (I) wherein R is chloro or methyl as a colourant in plastics materials for food packaging.
    Type: Grant
    Filed: June 2, 2001
    Date of Patent: November 5, 2002
    Assignee: Clariant Finance (BVI) Limited
    Inventor: Bansi Lal Kaul
  • Patent number: 6469103
    Abstract: The present invention pertains to an ethylene interpolymer composition characterized as having a narrow molecular weight distribution (MWD) and optimized compositional uniformity, a process for making such a composition and a fabricated article made from such composition. The novel composition is characterized as having at least two polymer components, the first component having an ATREF peak temperature, Tpeak1 and a viscosity average molecular weight, Mv1, and the second component having an ATREF peak temperature, Tpeak2, and a viscosity average molecular, Mv2, wherein the temperature differential between Tpeak2 and Tpeak1 decreases with increased composition density and Mv1/Mv2 is less than or equal to 1.2. The novel composition is further characterized as having a Mw/Mn of less than or equal to 3.3 as determined by gel permeation chromatography, an I10/I2>6.6, and a composition density less than 0.945 gram/cubic centimeter.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: October 22, 2002
    Assignee: The Dow Chemical Company
    Inventors: Pradeep Jain, Lonnie G. Hazlitt, Jacquelyn A. deGroot, Kenneth W. Anderson
  • Patent number: 6444774
    Abstract: This invention relates generally to fibers and fabrics prepared using crystalline propylene polymer compositions comprising both propylene homopolymer and propylene copolymer. The propylene polymer compositions are prepared using at least one metallocene catalyst system in a polymerization process that involves the initial homopolymerization of propylene followed by the copolymerization of propylene with a small amount of comonomer. Fibers prepared with these propylene polymers are significantly more elastic and fabrics prepared with these polymers have a significantly broader bonding window which allows for more easy processing compared to fibers and fabrics prepared from known propylene polymers.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: September 3, 2002
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: G. Allan Stahl, Galen C. Richeson
  • Patent number: 6444744
    Abstract: The invention provides a hydrophilic resin and an absorbent article, both of which display still less coloring and discoloring when preserved for a long time. The hydrophilic resin is any one of: 1) a hydrophilic resin, obtained by a process including the step of polymerizing a monomer component including a major proportion of either one or both of acrylic acid and its salt which merely have a content of at most 0.20 ppm in total of hydroquinone and benzoquinone; 2) a hydrophilic resin, comprising a major proportion of an acrylic polymer and a minor proportion of either one or both of hydroquinone and benzoquinone, with the hydrophilic resin further comprising a quinhydronation inhibitor of 10˜1,000,000 times the total weight of hydroquinone and benzoquinone; 3) a hydrophilic resin, comprising a major proportion of an acrylic polymer and merely having a coloring degree (YI) of at most 20 after being left under conditions of the open system, 70° C.
    Type: Grant
    Filed: February 27, 1999
    Date of Patent: September 3, 2002
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Hirotama Fujimaru, Kunihiko Ishizaki, Nobuyuki Harada, Sei Nakahara