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:
May. 20, 1980
Filed:
Apr. 05, 1979
Applicant:
Inventor:
Raphael A Simon, Avondale Estates, GA (US);
Assignee:
Corning Glass Works, Corning, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; C03B / ; C03B / ;
U.S. Cl.
CPC ...
428428 ; 65 90 ; 65121 ; 65DI / ; 428913 ;
Abstract
A relatively thin layer of molten photochromic glass is formed on the surface of a relatively thick molten core glass of greater viscosity than that of the photochromic glass as such core glass is drawn into sheet form. The core glass is selected for its viscosity-temperature characteristics such that the core glass will support the photochromic surface glass during the temperature cycle required for developing the photochromic properties of such surface glass.