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. 07, 1997
Filed:
Sep. 02, 1993
Applicant:
Inventors:
William J Clegg, Chester, GB;
Kevin Kendall, Runcorn, GB;
Assignee:
Tioxide Specialties Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
156 89 ; 264 57 ; 156196 ;
Abstract
Process for producing a layered ceramic product which includes sintering layers of sinterable particulate ceramic material while in face-to-face contact. Before such contact, the surface of at least one of the layers is modified to provide a zone of weakness between the layers. This zone acts to deflect a crack propagating across the layers thereby increasing the work required to break the product. The product may also have improved fracture toughness.