The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 1985
Filed:
Sep. 11, 1984
Applicant:
Inventors:
Hiroyasu Komazawa, Fuji, JP;
Hiroshi Hotta, Fuji, JP;
Hiroshi Nakatsuji, Fuji, JP;
Kiyoshi Yoko, Fujinomiya, JP;
Seiichi Higashiyama, Fuji, JP;
Tuneyasu Nakashima, Kawasaki, JP;
Noboru Gotoh, Fujinomiya, JP;
Assignee:
Polyplastics Company, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528480 ;
Abstract
A crude polyacetal polymer obtained by polymerization or copolymerization and having as a principal component thereof connected oxymethylene radicals in a main chain is treated in a non-soluble liquid medium at temperatures higher than 80.degree. C. but lower than the melting point of the polymer and at heterogeneous equilibrium, moving the crude polymer and the non-soluble medium in opposite directions relative to each other.