Patents by Inventor Seiji Nagasawa

Seiji Nagasawa 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 carboxylic acid esters
    Patent number: 4990651
    Abstract: Carboxylic acid esters, industrially important compounds, are obtained by reacting carboxylic acid amides and formic acid esters, or carboxylic acid amides, alcohols and carbon monoxide in the presence of metal alcoholate.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: February 5, 1991
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Hideo Ikarashi, Yoshio Kawai, Seiji Nagasawa, Hiroyuki Hirayama
  • Process for production of carboxylic acid esters
    Patent number: 4973739
    Abstract: Carboxylic acid esters, industrially important compounds, are efficiently obtained by reacting carboxylic acid amides with formic acid esters in the presence of an inorganic solid acid catalyst.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: November 27, 1990
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Seiji Nagasawa, Hideo Ikarashi, Yoshio Kawai, Hiroyuki Hirayama