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:
Feb. 22, 1977
Filed:
Apr. 17, 1975
Jeremy D Scherer, Dartmouth, MA (US);
Isotronics, Inc., New Bedford, MA (US);
Abstract
An ultraviolet-transmitting glass window assembly comprising a metallic mounting ring containing an ultraviolet-transmitting glass is made by placing a preformed ultraviolet-transmitting glass member in the center of the metallic ring which has a higher coefficient of thermal expansion than the glass, heating the resulting assembly to melt the glass whereby it completely fills the ring, and cooling the assembly whereby a compression seal is achieved due to the greater shrinkage of the metallic ring. This window assembly is sealed over the memory chip of a programmable read only memory package to provide for ultraviolet erasure of the program information stored in the memory device.