Patents by Inventor Yasumasa Takenaka

Yasumasa Takenaka 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).

  • Method for producing arylhydroxylamine
    Patent number: 8455690
    Abstract: The invention provides a method for producing an arylhydroxylamine compound efficiently and safely under mild conditions. The method involves contacting a nitroaryl compound with a hydrogen source in the presence of a platinum catalyst supported on amino group-coordinated silica and a poisoning agent.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: June 4, 2013
    Assignees: Wako Pure Chemical Industries, Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Yasumasa Takenaka, Jun-Chul Choi, Toshiyasu Sakakura, Hiroyuki Yasuda, Takahiro Kiyosu
  • METHOD FOR PRODUCING ARYLHYDROXYLAMINE
    Publication number: 20100113830
    Abstract: Problem To provide a method for producing an arylhydroxylamine compound efficiently and safely under mild conditions. Means for Solving the Problem The present invention relates to a method for producing anarylhydroxylamine compound, which comprises contacting a nitroaryl compound with a hydrogen source in the coexistence of a platinum catalyst supported on amino group-coordinated silica and a poisoning agent.
    Type: Application
    Filed: March 27, 2008
    Publication date: May 6, 2010
    Applicant: WAKO PURE CHEMICAL INDUSTRIES, LTD.
    Inventors: Yasumasa Takenaka, Jun-Chul Choi, Toshiyasu Sakakura, Hiroyuki Yasuda, Takahiro Kiyosu