Patents by Inventor Tadashi Hashimukai

Tadashi Hashimukai 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 the preparation of L-serine by an enzymatic method
    Patent number: 5382517
    Abstract: The invention relates to a process for preparing L-serine from glycine and formaldehyde in the presence of cells of a microorganism or a cell-treated product having a serine hydroxymethyl transferase activity by an enzymatic method.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: January 17, 1995
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Daisuke Ura, Tadashi Hashimukai, Toshio Matsumoto, Nobuhiro Fukuhara
  • Method of separating monohydrate of L-cysteine hydrochloride
    Patent number: 4733010
    Abstract: Hydrochloric acid is added to a solution containing L-cysteine, L-cystine, L-serine and an inorganic salt until it contains at least 15% by weight of hydrochloric acid. The solution is held at a temperature of at least 20.degree. C. so that the L-cystine and the inorganic salt may form a solid, and the solid is removed from the solution. The solution is cooled to a temperature not exceeding 10.degree. C., so that crystallization may take place to form the monohydrate of L-cysteine hydrochloride. The monohydrate is separated from the L-serine in the solution.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: March 22, 1988
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Shyoichiro Miyahara, Toshiaki Kamiguchi, Tadashi Hashimukai, Kazunari Nitta