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:
Aug. 03, 1993
Filed:
Dec. 05, 1991
Applicant:
Inventors:
Robert Guglielmetti, Marseille, FR;
Pascale Tardieu, Paris, FR;
Assignee:
Essilor International (Compagnie Generale d'Optique), Creteil, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
544 99 ; 544101 ;
Abstract
The invention relates to novel photochromic compounds of the family of indolino-spiro-oxazines, these compounds being distinguished by the fact that they correspond to the formula of an indolino-spiro-benzo-cyclodiazene.
Guglielmetti, Robert. (1993). Photochronic compounds of the indolino-spiro-benzoxazine type (U.S. Patent No. 5233038). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5233038
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile