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:
Dec. 17, 1991
Filed:
Nov. 27, 1989
Applicant:
Inventors:
Benjamin M DeKoven, Midland, MI (US);
Patrick L Hagans, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B05D / ; B23K / ;
U.S. Cl.
CPC ...
428698 ; 428702 ; 427 11 ; 427294 ; 228114 ;
Abstract
Novel ceramic or metal-ceramic articles having an oxidized surface are produced by a tribochemical method. The oxidized surface is produced by initially wear scarring, under high vacuum, opposed, articulating ceramic or metal-ceramic surfaces and, thereafter, continuing the wear scarring in the presence of oxygen or air at less than atmospheric pressure. A method of welding ceramic or metal-ceramic articles is also disclosed.