Patents by Inventor Masahiro Ejiri

Masahiro Ejiri 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 tripeptides
    Patent number: 6994987
    Abstract: A process for efficiently, easily and stably producing tripeptides Val-Pro-Pro and Ile-Pro-Pro, which are useful as hypotensive drugs, anti-stress drugs, etc., by an enzymatic method. This process involves the step of cleaving a milk casein-containing material with a proteinase to form an intermediate peptide selected from the group consisting of a peptide containing the sequence Val-Pro-Pro but having no Pro other than this sequence, a peptide containing the sequence Ile-Pro-Pro but having no Pro other than this sequence, and a mixture of these peptides, and then cleaving the intermediate peptide with a peptidase to thereby give at least one of the tripeptides Val-Pro-Pro and Ile-Pro-Pro.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: February 7, 2006
    Assignee: Calpis Co., Ltd.
    Inventors: Naoyuki Yamamoto, Keita Ueno, Masahiro Ejiri