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. 23, 1993
Filed:
Aug. 09, 1991
Hiro Matsuda, Tsukuba, JP;
Shuji Okada, Tsukuba, JP;
Hachiro Nakanishi, Tsukuba, JP;
Masao Kato, Tsukuba, JP;
Minoru Ohsugi, Tsukuba, JP;
Shigeru Takaragi, Hiroshima, JP;
Nanao Horiishi, Hiroshima, JP;
Toda Kogyo Corp., Hiroshima, JP;
The Agency of Industrial Science and Technology, Tokyo, JP;
Abstract
Disclosed herein are polydiphenyldiacetylenes having the following repeating unit (III): ##STR1## (wherein R.sup.1 denotes a hydrogen atom or a methoxy group; R.sup.2 denotes a hydrogen atom, a methoxy group or a methylamino group; R.sup.3 denotes a hydrogen atom or a trifluoromethyl group; and R.sup.4 denotes a hydrogen atom or a trifluoromethyl group; provided that R.sup.1 is not a hydrogen atom when R.sup.2 is hydrogen atom, and R.sup.3 is not a hydrogen atom when R.sup.4 is hydrogen atom).