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:
Jan. 30, 2001
Filed:
Aug. 31, 1998
Applicant:
Inventors:
Assignee:
Asahi Lite Optical Co., Ltd., Fukui, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B08B 3/00 ;
U.S. Cl.
CPC ...
B08B 3/00 ;
Abstract
As a method by which failed products of hard-coated plastic lenses, especially hard-coated high-refractive-index plastic lenses can be regenerated to be in a re-usable condition, plastic lenses coated with a hard coat consisting essentially of an organopolysiloxane compound and an inorganic oxide, are contacted with an aqueous solution of a silicate and/or a phosphate. For example, an aqueous solution of 30% trisodium phosphate heated at 50° C. is sprayed over hard-coated plastic lenses for 5 minutes. The hard coat is removed from the lenses, while the surface of the coat-removed lenses is not roughed. The coat-removed lenses are re-usable.