Patents by Inventor Kiyoshi Katsumoto

Kiyoshi Katsumoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6906146
    Abstract: Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties which differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irradiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences. Also disclosed are compositions comprising a component which comprises an ethylenic or polyethylenic backbone and a pendant or terminal moiety comprising a benzylic, allylic, or ether-containing radical.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 14, 2005
    Assignee: Phillips Petroleum Company
    Inventors: Ta Yen Ching, Kiyoshi Katsumoto
  • Publication number: 20030109643
    Abstract: Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties which differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irradiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences.
    Type: Application
    Filed: June 7, 1995
    Publication date: June 12, 2003
    Inventors: TA Y. CHING, KIYOSHI KATSUMOTO
  • Patent number: 6323288
    Abstract: Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties which differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irradiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences. Also disclosed are compositions comprising a component which comprises an ethylenic or polyethylenic backbone and a pendant or terminal moiety comprising a benzylic, allylic, or ether-containing radical.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: November 27, 2001
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Ta Yen Ching, Kiyoshi Katsumoto, Steven P. Current, Leslie P. Theard
  • Patent number: 6139770
    Abstract: An oxygen scavenging composition or system is provided comprising an oxygen scavenging material, a photoinitiator, and at least one catalyst effective in catalyzing an oxygen scavenging reaction, wherein the photoinitiator comprises a benzophenone derivative containing at least two benzophenone moieties. A film, a multi-phase composition, a multi-layer composition, a multi-layer film, an article comprising the oxygen scavenging composition, a method for preparing the oxygen scavenging composition, and a method for scavenging oxygen are also provided. Non-extractable benzophenone derivative photoinitiators and methods for preparing same are also provided.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: October 31, 2000
    Assignees: Chevron Chemical Company LLC, Cryovac, Inc.
    Inventors: Kiyoshi Katsumoto, Ta Yen Ching, Joseph L. Goodrich, Drew Ve Speer
  • Patent number: 6057013
    Abstract: Provided is a system useful for oxygen scavenging which comprises at least two components, i.e., an oxygen scavenging material which forms at least one by-product upon reaction thereof with oxygen, and an effective amount of a neutralizing material capable of neutralizing at least a portion of these by-products. In a preferred application, a multi-layer structure that can be employed in producing packages and in particular food packages, comprises a first layer including an oxygen scavenging material and a second layer which includes a material that is capable of neutralizing at least a portion of the by-products produced by the oxidation of the oxygen scavenging material within the first layer. These two layers are arranged such that, upon formation of the package, the second layer is interior to the first layer. Furthermore, the multi-layer film can include one or more of an oxygen barrier layer, a polymeric selective barrier layer, and a heat-sealable layer.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: May 2, 2000
    Assignee: Chevron Chemical Company
    Inventors: Ta Yen Ching, Joseph L. Goodrich, Kiyoshi Katsumoto
  • Patent number: 5859145
    Abstract: Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties which differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irradiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences. Also disclosed are compositions comprising a component which comprises an ethylenic or polyethylenic backbone and a pendant or terminal moiety comprising a benzylic, allylic, or ether-containing radical.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 12, 1999
    Assignee: Chevron Chemical Company
    Inventors: Ta Yen Ching, Kiyoshi Katsumoto, Steven P. Current, Leslie P. Theard
  • Patent number: 5776361
    Abstract: An oxygen scavenging composition or system is provided comprising at least one polyterpene and at least one catalyst effective in catalyzing an oxygen scavenging reaction. A film, a multi-phase composition, a multi-layer composition, an article comprising the oxygen scavenging composition, a method for preparing the oxygen scavenging composition, and a method for scavenging oxygen are also provided.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: July 7, 1998
    Assignee: Chevron Chemical Company
    Inventors: Kiyoshi Katsumoto, Ta Yen Ching
  • Patent number: 5736616
    Abstract: Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties which differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irradiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences. Also disclosed are compositions comprising a component which comprises an ethylenic or polyethylenic backbone and a pendant or terminal moiety comprising a benzylic, allylic, or ether-containing radical.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 7, 1998
    Assignee: Chevron Chemical Company
    Inventors: Ta Yen Ching, Kiyoshi Katsumoto, Steven P. Current, Leslie P. Theard
  • Patent number: 5660761
    Abstract: An improved oxygen scavenging system is provided. The system involves an oxygen scavenging phase containing at least one oxygen-scavenger and a second phase comprising at least one catalyst effective in catalyzing a scavenging reaction. The oxygen scavenging phase is substantially devoid of any catalyst of the scavenging reaction and the second phase is effectively separate from the oxygen scavenging phase. Nevertheless, the oxygen scavenging system provides excellent scavenging capabilities while avoiding many of the prior art problems, such as undesired oxidation during high temperature processing when the system is incorporated into a multi-layer film.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: August 26, 1997
    Assignee: Chevron Chemical Company
    Inventors: Kiyoshi Katsumoto, Ta Yen Ching, Leslie P. Theard, Steven P. Current
  • Patent number: 5641825
    Abstract: The invention provides a composition of matter having oxygen scavenger capabilities. The composition comprises a blend of a first polymeric component comprising a polyolefin, the first polymeric component having been grafted with an unsaturated carboxylic anhydride or an unsaturated carboxylic acid, or combinations thereof, or with an epoxide; a second polymeric component having OH, SH or NHR.sup.2 groups where R.sup.2 is H, C.sub.1 -C.sub.3 alkyl, substituted C.sub.1 -C.sub.3 alkyl; and a metal salt capable of catalyzing the reaction between oxygen and the second polymeric component, the polyolefin being present in an amount sufficient so that the blend is non phase-separated. In the preferred composition maleic anhydride is the grafted material, the second polymeric component is MXD6 nylon and the metal is cobalt. A method of providing a homogeneous blend of a polyolefin with a second polymeric component having OH, SH or NHR.sup.2 groups is also set forth.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: June 24, 1997
    Assignee: Chevron Chemical Company
    Inventors: Robert Bacskai, Ta Yen Ching, Kiyoshi Katsumoto
  • Patent number: 5627239
    Abstract: Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties which differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irradiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences.Also disclosed are compositions comprising a component which comprises an ethylenic or polyethylenic backbone and a pendant or terminal moiety comprising a benzylic, allylic, or ether-containing radical.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 6, 1997
    Assignee: Chevron Chemical Company
    Inventors: Ta Y. Ching, Kiyoshi Katsumoto, Steven P. Current, Leslie P. Theard
  • Patent number: 4900458
    Abstract: A corrosion inhibiting polyalkylenepolyamine composition comprising a mixture of(a) at least one C-alkyl-ethylene diamine, and(b) at least one di-(C-alkyl)-diethylenetriamine or at least one di-(C-alkyl)-piperazine or a mixture thereof;wherein each C-alkyl group on the ethylene diamine, diethylenetriamine and piperazine independently contains from 10 to 28 carbon atoms. Methods for preparing this composition are also disclosed, as well as methods for its use in inhibiting corrosion of corrodible metals.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: February 13, 1990
    Assignee: Chevron Research Company
    Inventors: Albert H. Schroeder, Ta Y. Ching, Shigeto Suzuki, Kiyoshi Katsumoto
  • Patent number: 4187370
    Abstract: An alkaline-catalyzed process for preparing poly-2-pyrrolidone characterized by the step of treating the polypyrrolidone reaction product mixture with an acid to prevent polymer agglomeration and prevent base-catalyzed polymer degradation. In another embodiment, unreacted poly-2-pyrrolidone is recovered by washing the acid-treated polymer reaction product mixture with water and the resulting wash water recovered, treated with further acid, and then subjected to a two-stage evaporation process. Poly-2-pyrrolidone is known as nylon 4, and can be shaped into filaments and various molded articles.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: February 5, 1980
    Assignee: Chevron Research Company
    Inventors: Byron E. Anshus, Kiyoshi Katsumoto, Ira M. Serkes
  • Patent number: 4187235
    Abstract: A crystalline vanadium (IV) phosphate composition having an intrinsic surface area in excess of 10 square meters per gram is prepared by the reaction of orthophosphoric acid with a vanadium (IV) oxycompound. The vanadium compound is suspended in a suitable hydroxylic organic medium, for example isobutanol, and contacted with the acid at a temperature in the range 20.degree. C. to 210.degree. C. until the conversion is completed. The catalyst is used in the oxidation of n-butane to maleic anhydride.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: February 5, 1980
    Assignee: Chevron Research Company
    Inventors: Kiyoshi Katsumoto, David M. Marquis
  • Patent number: 4139696
    Abstract: 2-Pyrrolidone is continuously polymerized to a high-molecular-weight particulate product by the stirred polymerization of the carbonated alkaline polymerizate. The polymerizate is prepared by contacting an aqueous hydroxide with excess 2-pyrrolidone, maintaining the resultant alkaline mixture at an elevated temperature for sufficient time to reduce the 2-pyrrolidone dimer content of the mixture to within the desired limits, dehydrating the alkaline mixture to reduce the water content to within the desired limits, and contacting the alkaline mixture with carbon dioxide to form the carbonated alkaline polymerizate. The paste of particular polypyrrolidone and liquid polymerizate is continuously withdrawn from the reactor, neutralized with aqueous acid and washed with warm water.
    Type: Grant
    Filed: April 29, 1977
    Date of Patent: February 13, 1979
    Assignee: Chevron Research Company
    Inventors: Byron E. Anshus, Kiyoshi Katsumoto, Ira M. Serkes
  • Patent number: 4132670
    Abstract: A crystalline vanadium (IV) phosphate composition having an intrinsic surface area in excess of 10 square meters per gram is prepared by the reaction of orthophosphoric acid with a vanadium (IV) oxycompound. The vanadium compound is suspended in a suitable hydroxylic organic medium, for example isobutanol, and contacted with the acid at a temperature in the range 20.degree. C. to 210.degree. C. until the conversion is completed.
    Type: Grant
    Filed: October 6, 1976
    Date of Patent: January 2, 1979
    Assignee: Chevron Research Company
    Inventors: Kiyoshi Katsumoto, David M. Marquis
  • Patent number: 4130521
    Abstract: Moisture-containing nylon-4 powder is treated under heat and pressure to produce a solid material of bulk density suitable for melt-spinning.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: December 19, 1978
    Assignee: Chevron Research Company
    Inventors: Kiyoshi Katsumoto, Edward L. Nimer
  • Patent number: 4013626
    Abstract: An improved process for the production of poly-2-pyrrolidone in which the solid product is washed with monomer to remove the catalyst and the monomer wash, containing catalyst and monomer, is recycled for further polymerization reaction.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: March 22, 1977
    Assignee: Chevron Research Company
    Inventors: Kiyoshi Katsumoto, Richard A. Wuopio
  • Patent number: 4001274
    Abstract: 2-PYRROLIDONE IS SEPARATED FROM AQUEOUS SOLUTION BY PHASE SEPARATION IN THE PRESENCE OF POTASSIUM HYDROGEN PHOSPHATE.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: January 4, 1977
    Assignee: Chevron Research Company
    Inventor: Kiyoshi Katsumoto
  • Patent number: 3970708
    Abstract: In a process for the production of alkyl phenols by alkylating phenols with olefins in the presence of an aluminum phenoxide catalyst, removal of spent catalyst by adding water to reaction mixture and filtering is hastened by the presence of a neutral monomeric inorganic salt of polyvalent anion and an alkali metal, alkaline earth metal or ammonium cation.
    Type: Grant
    Filed: December 26, 1974
    Date of Patent: July 20, 1976
    Assignee: Chevron Research Company
    Inventor: Kiyoshi Katsumoto