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:
Feb. 16, 1999
Filed:
Sep. 30, 1997
Yasunari Nishikata, Ebina, JP;
Lyong Sun Pu, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A novel cyclobutenedione derivative prepared in accordance with the following reaction formula, a process for the preparation thereof, and a nonlinear optical element comprising such a derivative are provided: ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl group, an alkenyl group or an alkynyl group; R.sup.3 and R.sup.4 each represents a hydrogen atom, an alkyl group, an alkenyl group or an alkynyl group; and C* represents an asymmetric carbon atom, with the proviso that R.sup.1, R.sup.2 and the nitrogen atom to which they are connected may form a cyclic structure larger than 3-membered ring, R.sup.1 and R.sup.3, and R.sup.2 and R.sup.4 each may be connected to each other to form a methylene chain --(CH.sub.2).sub.2 --, and the hydrogen atoms in R.sup.1 and R.sup.2 may be substituted by halogen atom, alkyloxy group or cyano group.