Patents by Inventor Tadashi Hiramine

Tadashi Hiramine 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).

  • Ester group-containing tetracarboxylic acid dianhydride, polyester polyimide precursor, polyesterimide, and methods for producing same
    Patent number: 9096566
    Abstract: A polyesterimide having a repeating unit expressed by formula (3) is useful for FPC substrates, COF substrates and TAB substrate materials, especially as FPC substrate materials: wherein R represents a phenyl group, R1 represents an alkyl group with 1 to 6 carbon atoms or alkoxy group with 1 to 6 carbon atoms, n each independently takes a value of 0 to 4, a each independently takes a value of 0 to 4, and m represents an integer of 2 to 4, where not all n's are 0 at the same time and 0?n+a?4 is satisfied by each phenylene group, and X is a divalent aromatic group and/or aliphatic group.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: August 4, 2015
    Assignee: Honshu Chemical Industry Co., Ltd.
    Inventors: Masatoshi Hasegawa, Tadashi Hiramine, Yuuki Hashimoto
  • ESTER GROUP-CONTAINING TETRACARBOXYLIC ACID DIANHYDRIDE, POLYESTER POLYIMIDE PRECURSOR, POLYESTERIMIDE, AND METHODS FOR PRODUCING SAME
    Publication number: 20120029164
    Abstract: Disclosed is a polyesterimide having a repeating unit expressed by the formula below, and also provides the manufacturing methods thereof: wherein R represents a phenyl group, R1 represents an alkyl group with 1 to 6 carbon atoms or alkoxy group with 1 to 6 carbon atoms, n each independently takes a value of 0 to 4, a each independently takes a value of 0 to 4, and m represents an integer of 2 to 4, where not all n's are 0 at the same time and 0?n+a?4 is satisfied by each phenylene group, and X is a divalent aromatic group and/or aliphatic group.
    Type: Application
    Filed: February 12, 2010
    Publication date: February 2, 2012
    Applicant: HONSHU CHEMICAL INDUSTRY CO., LTD.
    Inventors: Masatoshi Hasegawa, Tadashi Hiramine, Yuuki Hashimoto
  • Method of producing poly(ortho-methylphenol)
    Patent number: 7321054
    Abstract: Poly(ortho-methylphenol) is obtainable at high purities and yields using industrial processes by causing a secondary amine and formaldehyde to react with a polyphenol (first step), and then breaking down the aminomethyl group of the obtained poly(ortho-aminomethyl)phenol by means of hydrogenolysis in the presence of a hydrogenation catalyst (second step).
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: January 22, 2008
    Assignee: Honshu Chemical Industry Co., Ltd.
    Inventors: Rie Azuma, Tadashi Hiramine
  • METHOD OF PRODUCING POLY(ORTHO-METHYLPHENOL)
    Publication number: 20070197832
    Abstract: Poly(ortho-methylphenol) is obtainable at high purities and yields using industrial processes by causing a secondary amine and formaldehyde to react with a polyphenol (first step), and then breaking down the aminomethyl group of the obtained poly(ortho-aminomethyl)phenol by means of hydrogenolysis in the presence of a hydrogenation catalyst (second step).
    Type: Application
    Filed: February 6, 2007
    Publication date: August 23, 2007
    Inventors: Rie AZUMA, Tadashi HIRAMINE
  • Diphenol and process for producing the same
    Patent number: 6872858
    Abstract: The invention provides a diphenol represented by the general formula (I) wherein X is a divalent cyclic hydrocarbon group selected from 1-cyclohexene-1,4-ylene group, 1,4-cyclohexylene group and p-phenylene group, R is an alkyl group of 1-4 carbon atoms, n is 0 or an integer of 1-3 when X is 1-cyclohexene-1,4-ylene group and an integer of 1-3 when X is 1,4-cyclohexylene group or p-phenylene group. The invention further provides a process for the production of the same.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: March 29, 2005
    Assignee: Honshu Chemical Industry Co., Ltd.
    Inventors: Kouji Muragaki, Tadashi Hiramine, Hiroyasu Ohno
  • Diphenol and process for producing the same
    Publication number: 20040049086
    Abstract: The invention provides a diphenol represented by the general formula (I) 1
    Type: Application
    Filed: August 5, 2003
    Publication date: March 11, 2004
    Inventors: Kouji Muragaki, Tadashi Hiramine, Hiroyasu Ohno