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:
Apr. 07, 1981
Filed:
Mar. 27, 1979
Shunsuke Matsushima, Otsu, JP;
Kazuhiko Hata, Niihama, JP;
Kentaro Mashita, Ibaraki, JP;
Shuichi Kanagawa, Osaka, JP;
Shinji Nakao, Sakai, JP;
Kiyoshi Nakai, Toyonaka, JP;
Kunimasa Kamio, Toyonaka, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
m-Isopropenylphenol oligomer which is useful for the production of synthetic resins such as epoxy resins is produced by polymerizing m-isopropenylphenol at a temperature of 135.degree. to 230.degree. C. using a catalytic amount of an acid catalyst in the presence or absence of a solvent, or freezing m-isopropenylphenol in the presence or absence of an acid catalyst.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile