Patents by Inventor Motonubu Minagawa

Motonubu Minagawa 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).

  • 2,2,6,6-Tetramethyl-4-piperidyl spiro aliphatic ethers as stabilizers for synthetic polymers
    Patent number: 4351915
    Abstract: 2,2,6,6-Tetramethyl-4-piperidyl spiro aliphatic ethers which are useful as stabilizers for organic polymeric materials, and have the general formula are disclosed: ##STR1## wherein: Y.sub.1 is ##STR2## A.sub.1, A.sub.2, A.sub.3, A.sub.4, A.sub.5, and A.sub.6 are groups which are defined in the specification, at least one pair of A.sub.1 and A.sub.2 ; A.sub.3 and A.sub.4 ; and A.sub.5 and A.sub.6 being taken together to form the group ##STR3## the groups R.sub.1, R.sub.2, R.sub.3 and Z as well as X, p, and m being as defined in the specification.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: September 28, 1982
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Naohiro Kubota, Toshihiro Shibata, Kazuo Sugibuchi, Motonubu Minagawa