Patents by Inventor Naohiko Ohashi

Naohiko Ohashi 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 preparing N-phosphonomethylglycine
    Patent number: 5948938
    Abstract: A process for preparing N-phosphonomethylglycine, which comprises treating N-phosphonomethyliminodiacetic acid in the presence of water, activated carbon and hydrogen peroxide. This process is a safe and efficient process for preparing N-phosphonomethylglycine.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: September 7, 1999
    Assignee: Sankyo Company, Limited
    Inventors: Kunio Nakano, Shuzi Sayama, Yukio Hirayama, Naohiko Ohashi