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. 29, 1994
Filed:
Mar. 12, 1992
Fumio Sanda, Okayama, JP;
Junichi Yamauchi, Kurashiki, JP;
Toshikazu Takata, Yokohama, JP;
Takeshi Endo, Yokohama, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
An asymmetric spiroorthocarbonate compound having one exomethylene group and represented by the following general formula (1) ##STR1## wherein A represents a group selected from the group consisting of: ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represents a hydrogen atom, a lower alkyl group having not more than 8 carbon atoms, an alkoxy group, a halogen group, a nitro group, a cyano group, an amino group, an amide group, a hydroxyl group or an alkyl ester group having not more than 20 carbon atoms; and R.sup.5, R.sup.6, R.sup.7 and R.sup.8, R.sup.9 through R.sup.14, R.sup.15 through R.sup.22, R.sup.23 through R.sup.28 and R.sup.29 through R.sup.36 each represents a hydrogen atom or a lower alkyl group having not more than 8 carbon atoms; and copolymers containing units therefrom.