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. 20, 2002
Filed:
Jan. 04, 2000
Pascale Laborde, Corning, NY (US);
Daniel L. G. Ricoult, Horseheads, NY (US);
Corning S.A., Avon Cedex, FR;
Abstract
The principal object of the present invention is organic lens molds, constituted wholly or in part of at least one specific inorganic glass, advantageously strengthened by a chemical tempering or a thermal tempering. Said glass has the following composition, expressed in percentages by weight: SiO 56-66, Al O 2.5-10, B O 0.5-7, Li O 0-3, Na O 8-15, K O 3-12, with Li O+Na O+K O 12-20, ZnO 2-12, MgO 0-3, TiO 0-0.5, ZrO 1-9, CaO 0-1, BaO 0-2, SrO 0-2, with MgO+CaO+SrO+BaO 0-5, Cl 0-0.5, As O +sb O 0-1. The invention also deals with novel inorganic glasses which have the above composition with a single exception relative to the Al O content: Al O 2.5-4.