Patents by Inventor Toyoji Sawayanagi

Toyoji Sawayanagi 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).

  • Alkaline protease having stability in solution with anionic surfactant, method for producing the same, use thereof and microorganism producing the same
    Patent number: 5387518
    Abstract: An alkaline protease, method for producing the same and detergents containing the protease as an aid are disclosed. The alkaline protease is obtained by cultivating in a medium the microorganism SD523 FERM BP-3774 or artificial mutants or genetically engineered variants thereof which have the ability of producing the alkaline protease. The alkaline protease has: (1) an optimum pH of from about 11 to 11.5 as measured after reaction at 30.degree. C. for 10 minutes using casein as a substrate and an optimum temperature of about 60.degree. C. as measured after reaction at pH 10 using casein as a substrate; (2) a half inactivation temperature of about 55.degree. C. as measured after reaction at pH 10 for 10 minutes; and (3) a molecular weight of 29,000.+-.2,000 as measured by SDS polyacrylamide gel electrophoresis. The enzyme has improved storage ability in liquid detergents as compared with known alkaline proteases produced by known microorganisms belonging to the genus Bacillus firmus.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: February 7, 1995
    Assignee: Showa Denko K.K.
    Inventors: Toyoji Sawayanagi, Mina Saito, Toshi Tsuzuki, Yoshio Fujiwara, Yoshitaka Noguchi