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:
Apr. 14, 1992
Filed:
Apr. 20, 1990
Applicant:
Inventor:
Hector Belmares, Santa Rosa, CA (US);
Assignee:
Pilkington Visioncare Holdings, Inc., Menlo Park, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427164 ; 427165 ; 4274195 ; 4274072 ; 4274121 ; 428447 ; 156662 ; 156668 ;
Abstract
A two-layer antireflective coating composition stacked on a substrate consisting of allyl diglycol carbonate polymer (CR-39) or glass and comprising a bottom layer containing less than 10% by weight of titanium dioxide equivalent weight and a titanium-free top layer containing polysiloxane resin; and a process for preparing said antireflective coating with improved adhesion on a substrate consisting of allyl diglycol carbonate polymer (CR-39) or glass. The thicknesses of each of said coating layers is in accordance with preselected equations, and the refractive indices of a said coating layers satisfy the following requirements: