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:
Nov. 28, 1978
Filed:
Jan. 24, 1977
Applicant:
Inventor:
Bernard L Laurin, Ludlow, MA (US);
Assignee:
American Optical Corporation, Southbridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02C / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428412 ; 3501 / ; 351166 ; 428409 ; 428447 ; 428913 ;
Abstract
Plastic substrates of optical elements having surfaces coated with the abrasion-resistant coating compositions described in U.S. Pat. No. 3,986,997 are improved by utilizing a tie-coat comprising an A-alkylenealkoxysilane where A contains a group reactive with the substrate. For some substrates, particularly polycarbonate lenses, the coating process is substantially simplified by reducing criticality of conditions when the tie-coat of the present invention is used than when the process of the aforementioned patent is followed with the tie-coats conventionally used and disclosed therein.