Patents by Inventor Takafumi Kubo

Takafumi Kubo 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).

  • Process for producing &agr;, &bgr;-unsaturated carboxylic acid esters and catalyst for use in such process
    Patent number: 6541656
    Abstract: Economical and efficient processes for producing an &agr;, &bgr;-unsaturated carboxylic acid heterocycle-inserted ester and an &agr;,&bgr;-unsaturated carboxylic acid polyheteroalkylene ester as well as a catalyst suited for use in economically and efficiently producing an &agr;,&bgr;-unsaturated carboxylic acid ester are provided. The invention provides (1) a process for producing an &agr;,&bgr;-unsaturated carboxylic acid ester which comprises reacting an &agr;,&bgr;-unsaturated carboxylic acid ester with a heterocyclic compound, (2) a process for producing an &agr;,&bgr;-unsaturated carboxylic acid ester which comprises reacting an &agr;,&bgr;-unsaturated carboxylic acid with a heterocyclic compound in the presence of a polymerization inhibitor and a metal oxide catalyst, and (3) a catalyst for the production of an &agr;,&bgr;-unsaturated carboxylic acid ester comprising a metal oxide.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: April 1, 2003
    Assignee: Nippon Shokubai Company, Ltd.
    Inventors: Keiji Yurugi, Takafumi Kubo
  • Reaction method using metallic ion catalyst and anion exchanger, separation method of the metallic ion catalyst, and reutilization method
    Publication number: 20020198403
    Abstract: The subject for the invention is to efficiently use, recover, and reuse a soluble metallic catalyst with great ease at low cost in various liquid-phase reactions using the soluble metallic catalyst.
    Type: Application
    Filed: March 25, 2002
    Publication date: December 26, 2002
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventor: Takafumi Kubo
  • Crosslinked polymer, method for manufacturing it and use thereof
    Publication number: 20020028887
    Abstract: The present invention is related to a crosslinked polymer excellent in ion exchange capacity and catalytic activity and in resistance to thermal decomposition and widely applicable in various fields of use; a crosslinking agent which is suited for use as a raw material in the production of crosslinked polymers; a method of producing crosslinked polymers; a method of producing a spherical particle which is suited for use in the production of crosslinked polymers; a method of producing a hydroxy alkyl (meth)acrylate; and a method of producing glycols using the crosslinked polymers.
    Type: Application
    Filed: June 15, 2001
    Publication date: March 7, 2002
    Inventors: Yoshiaki Hirano, Takehiko Morita, Takafumi Kubo, Hiroshi Yamamoto, Kenichi Takematsu, Yutaka Sugiyama
  • Process for producing alpha , beta-unsaturated carboxylic acid esters and catalyst for use in such process
    Publication number: 20010034300
    Abstract: Economical and efficient processes for producing an &agr;, &bgr;-unsaturated carboxylic acid heterocycle-inserted ester and an &agr;,&bgr;-unsaturated carboxylic acid polyheteroalkylene ester as well as a catalyst suited for use in economically and efficiently producing an &agr;,&bgr;-unsaturated carboxylic acid ester are provided.
    Type: Application
    Filed: February 8, 2001
    Publication date: October 25, 2001
    Applicant: Nippon Shokubai Company Ltd.
    Inventors: Keiji Yurugi, Takafumi Kubo