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:
Oct. 19, 1982
Filed:
Sep. 03, 1980
Applicant:
Inventors:
Robert T Scanlon, Santa Rosa, CA (US);
Robert M Gelber, Sebastapol, CA (US);
Assignee:
Optical Coating Laboratory, Inc., Santa Rosa, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H04N / ;
U.S. Cl.
CPC ...
350311 ; 350316 ; 350-16 ; 350166 ; 350320 ; 3502 / ; 358253 ;
Abstract
A contrast enhancement filter is produced by photographic reproduction of a master filter on to positive color transparency film. The master filter may be a multilayer thin film optical filter. The developed positive color transparency film may be laminated between a pair of glass sheets with layers of an ultraviolet absorbing polymer material.