Patents by Inventor Hisayou Osawa

Hisayou Osawa 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).

  • Piperidine derivatives
    Patent number: 4212974
    Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.
    Type: Grant
    Filed: July 14, 1978
    Date of Patent: July 15, 1980
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
  • Piperidine derivatives
    Patent number: 4125533
    Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: November 14, 1978
    Assignee: Sankyo Co. Ltd.
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
  • Piperidine derivatives
    Patent number: 4016168
    Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.
    Type: Grant
    Filed: February 26, 1975
    Date of Patent: April 5, 1977
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
  • Novel piperidine derivatives for the stabilization of synthetic polymers
    Patent number: 4007158
    Abstract: Novel piperidine derivatives of formula: ##STR1## (wherein 2 or 3 of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent alkyl groups having from 1 to 4 carbon atoms and the remainder of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen atoms, and R.sub.6 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a substituted alkyl group, an aliphatic acyl group, an alkoxycarbonyl group or an aralkoxycarbonyl group) are useful as stabilizers for synthetic polymers.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: February 8, 1977
    Assignee: Sankyo Company Limited
    Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa