Patents by Inventor Takeaki Etoh

Takeaki Etoh 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).

  • 2-(&ohgr;-alkoxycarbonyl alkanoyl)-4-butanolide
    Patent number: 6222049
    Abstract: 2-(&ohgr;-alkoxycarbonyl alkanoyl)-4-butanolide is produced with a high selectivity and yield through condensation reaction of Y-butyrolactone with a readily available, low-price dicarboxylate as represented by the following general formula: ROOC(CH2)nCOOR wherein n denotes an integer of 8-13, and R denotes an alkyl group or an alkenyl group.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: April 24, 2001
    Assignees: Toray Industries, Soda Aromatic Co., Ltd.
    Inventors: Tetsuya Katou, Go Hata, Takeaki Etoh, Nobuhiko Ito
  • Method for producing 2-(.omega.-alkoxycarbonyl alkanoyl)-4-butanolide and a long-chain .omega.-hydroxycarboxylic acid
    Patent number: 5808106
    Abstract: 2-(.omega.-alkoxycarbonyl alkanoyl)-4-butanolide can be produced unexpectedly with a high selectivity and yield through condensation reaction of .gamma.-butyrolactone with a highly available, lo.omega.-price dicarboxylate as represented by the following general formula:ROOC(CH2)nCOOR(where n denotes an integer of 7-13, and R denotes an alkyl group or an alkenyl group). Furthermore, a long-chain .omega.-hydroxycarboxylic acid can be produced by subjecting 2-(.omega.-alkoxycarbonyl alkanoyl)-4-butanolide to hydrolysis and decarboxylation and reducing the carbonyl groups in the resultant product into methylene groups.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: September 15, 1998
    Inventors: Tetsuya Katou, Go Hata, Takeaki Etoh, Nobuhiko Ito
  • Perfume composition containing an unsaturated aliphatic carboxylic acid
    Patent number: 4609492
    Abstract: Provided is a perfume composition containing a straight-chain trans-6-alkenoic acid represented by the general formula ##STR1## wherein n is an integer of 1 to 4.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: September 2, 1986
    Assignee: Soda Aromatic Company, Limited
    Inventors: Go Hata, Takeaki Etoh, Toshifumi Shirakawa, Yuji Matsuura, Takashi Uchiyama