Patents by Inventor Motomobu Minagawa

Motomobu 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).

  • Stabilized polymer composition
    Patent number: 4221700
    Abstract: A stabilized synthetic polymer composition comprising(1) 100 parts by weight of a synthetic polymer,(2) 0.001 to 5 parts by weight of a poly(alkylated alkenylphenol) composed substantially of monomeric units represented by the following formula (I) ##STR1## wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R.sub.1 represents an alkyl group having 1 to 18 carbon atoms; and R.sub.2 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms; and(3) 0.001 to 5 parts by weight of an auxiliary stabilizer selected from the group consisting of polyhydric alcohol esters of alkylthioalkanoic acids, polyesters of thiodipropionic acid and organic phosphite compounds.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: September 9, 1980
    Assignee: Maruzen Oil Co., Ltd.
    Inventors: Motomobu Minagawa, Mitsuo Akutsu, Hiroshi Fujiwara, Masayuki Kashiki