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. 15, 1978
Filed:
Jul. 12, 1976
Applicant:
Inventors:
William R Brewer, Hingham, MA (US);
Kenneth S Norland, Belmont, MA (US);
Richard F Wright, Acton, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350354 ; 427163 ;
Abstract
The present invention is directed toward light-transmitting photochromic articles with low haze levels under illumination and processes for forming said articles without employing high temperature chemistry or heat treatments to initiate photochromism.
Brewer, William. (1978). Reduced haze photochromic systems (U.S. Patent No. 4106861). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4106861
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile