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:
Jan. 12, 1988
Filed:
Jan. 27, 1986
Masahiro Irie, Osaka, JP;
Shuichi Maeda, Saitama, JP;
Mitsubishi Chemical Industries Limited, Tokyo, JP;
Abstract
A spiroxazine compound represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl group, an allyl group, an aryl group or an aralkyl group; rings A and B each represents a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring or a substituted or unsubstituted heterocyclic ring; X represents an oxygen atom or a sulfur atom; and n represents an integer of from 1 to 6, and a photochromic composition containing said spiroxazine compound are disclosed. The compound is excellent in compatibility to and solubility in high molecular weight compounds, and the composition containing the same stably develops a color of high density upon irradiation of ultraviolet rays.