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:
Oct. 05, 1976
Filed:
Nov. 12, 1974
Applicant:
Inventors:
Ronald William Jones, Milton Keynes, EN;
Peter William McMillan, Shrewley, EN;
Assignee:
National Research Development Corporation, London, EN;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ; B32B / ;
U.S. Cl.
CPC ...
428392 ; 65 3 / ; 65 33 ; 428397 ; 428400 ; 428410 ;
Abstract
A glass ceramic body having a microcrystalline interior and a relatively amorphous outer surface layer, the composition of said layer comprising ions of at least two alkali metals the ratio of the concentrations of which ions increases from said layer to said interior.