Patents by Inventor Syoji Moromura

Syoji Moromura 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 and their use as polymer stabilizers
    Patent number: 4371644
    Abstract: Piperidine derivatives in which two or three piperidine residues each substituted at the 2- and the 6-position by two methyl groups or by one methyl group and one ethyl group, the piperidine residues being attached by means of substituted alkylene groups, by means of polyoxyalkylene groups (whose oxyalkylene chain is optionally interrupted by one or more phenylene or cyclohexylene groups), by means of substituted isocyanurate groups or by means of glyceryl groups, and acid addition salts thereof are valuable as stabilizers for synthetic polymers.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: February 1, 1983
    Assignee: Sankyo Company Ltd.
    Inventors: Nobuo Soma, Syoji Moromura, Takao Yoshioka, Tomoyuki Kurumada