Patents by Inventor Yasushi Takata

Yasushi Takata 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).

  • Glycosidation catalust and process for preparing glycoside derivatives
    Patent number: 4874852
    Abstract: Disclosed are a glycosidation catalyst comprising at least one of heteropoly acids represented by the formulaH.sub.a X.sub.p M.sub.q O.sub.r .multidot.bH.sub.2 Owherein X is P, As, Si or Ge, M is at least one species selected from the group consisting of Mo, W and V, a is 3 4 or 6, b is an integer of 0 to 30, p is 1 or 2, q is 12 or 18, and r is 40 or 62, with the proviso that when X is P or As, a is 3 or 6; when X is Si or Ge, a is 4; and further (1) when X is P or As and a is 3, or when X is Si or Ge and a is 4, M is at least one species selected from the group consisting of Mo, W and V, p is 1, q is 12 and r is 40; and (2) when X is P or As and a is 6, M is Mo or W, p is 2, q is 18 and r is 62, and a process for preparing a glycoside derivative by using said catalyst.
    Type: Grant
    Filed: March 10, 1989
    Date of Patent: October 17, 1989
    Assignee: Nippon Fine Chemical Co., Ltd.
    Inventors: Keisuke Kinomura, Sadaya Kitazawa, Yasushi Takata, Toshiyuki Sakakibara