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:
Dec. 22, 1992
Filed:
Sep. 14, 1988
Applicant:
Inventor:
Hector Belmares, Petaluma, CA (US);
Assignee:
Pilkington Visioncare Holdings, Inc., Menlo Park, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428426 ; 428212 ; 428213 ; 428412 ; 428429 ; 428446 ; 428447 ; 428448 ; 428704 ; 428913 ; 359580 ; 359581 ; 359589 ;
Abstract
A three-layer antireflective coating composition for a CR-39 or glass substrate comprising a middle layer containing titanium compounds sandwiched between top and bottom layers containing polysiloxane, wherein the top and bottom layers are titanium-free; and a process for preparing said antireflective coating with improved adhesion on a CR-39 or glass substrate. The thicknesses of each of said coating layers is in accordance with preselected equations, and the refractive indices of said coating layers satisfy the following requirements: