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:
Mar. 06, 1990
Filed:
May. 08, 1987
Kiyotaka Shigehara, Tokyo, JP;
Akira Yamada, Kamifukuoka, JP;
Masahiko Hara, Shiki, JP;
Hidenari Nakahama, Ichihara, JP;
Seizo Miyata, Hoya, JP;
Yoshishige Murata, Ibaraki, JP;
Nippon Oil and Fats Co., Ltd., Tokyo, JP;
Rikagaku Kenkyusho, Saitama, JP;
Abstract
A Langmuir-Blodgett ultrathin membrane is constituted of polyfumarate having a degree of polymerization of 20 to 10,000. The polyfumarate is obtained by polymerizing fumarate represented by the general formula of: ##STR1## wherein at least one of R.sub.1 and R.sub.2 represents a bulky hydrocarbon group such as a branched alkyl group, a cycloalkyl group or a substituent thereof, a fluorine-substituted hydrocarbon group, a hetero atom-containing hydrocarbon group or a silicon-containing group.