Patents by Inventor Masaya Tokai

Masaya Tokai 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).

  • Protein complementing yeast low temperature-sensitivity fermentability
    Patent number: 6924132
    Abstract: The present invention relates to yeast having DNA encoding a protein having the amino acid sequence of SEQ ID NO:2, or a gene which comprises DNA having the nucleotide sequence of SEQ ID NO: 1.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: August 2, 2005
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Hideki Kawasaki, Masaya Tokai, Yasuhiro Kikuchi, Kozo Ouchi
  • DNA encoding protein complementing yeast low temperature-sensitive fermentability
    Patent number: 6172196
    Abstract: The present invention relates to a protein having the amino acid sequence represented by SEQ ID NO: 1, or a protein being capable of complementing the mutation exhibiting low-temperature-sensitive fermentability and having an amino acid sequence wherein one or more amino acid residues are added, deleted or substituted in the amino acid sequence represented by SEQ ID NO: 1; a gene which encodes said protein; and a gene which comprises DNA having the nucleotide sequence represented by SEQ ID NO: 1, or comprises DNA being capable of complementing the mutation exhibiting low-temperature-sensitive fermentability and having a nucleotide sequence wherein one or more DNAs are added, deleted or substituted in the nucleotide sequence represented by SEQ ID NO: 1.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: January 9, 2001
    Assignee: Kyowa Hakko Kogyo Co., Ltd.
    Inventors: Hideki Kawasaki, Masaya Tokai, Yasuhiro Kikuchi, Kozo Ouchi
  • Permselective membrane
    Patent number: 4695383
    Abstract: A permselective membrance suitable for obtaining fresh water by the desalination of sea water and salt water is provided herein, said permselective membrane being prepared by the reaction of an aromatic polycarboxylic acid component with a mixed diamine component comprising a diaminodiphenylsulfone compound of the formula (I), ##STR1## wherein R.sup.1 is hydrogen atom or a C.sub.1 -C.sub.12 hydrocarbon group, R.sup.2 s may be same or different, each representing a monovalent organic group, and n is an integer of 0 or 1 to 3, and an alicyclic diamine compound containing two secondary amino groups in the same or different ring(s).
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: September 22, 1987
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Shigeji Konagaya, Osamu Watanabe, Hideshi Kuzumoto, Masaya Tokai, Haruhiko Narusawa, Yasuo Kato