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. 30, 1990
Filed:
Sep. 24, 1987
Applicant:
Inventors:
Adolph L Micheli, Mt. Clemens, MI (US);
Dennis F Dungan, Mt. Clemens, MI (US);
Assignee:
General Motors Corp., Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501152 ; 501126 ;
Abstract
Refractory ceramics are provided which comprise at least about 70 mole percent yttrium oxide and from about 5 to 30 mole percent aluminum oxide. The ceramics are particularly resistant to attack by molten rare earth alloys and are superior refractories for use with molten neodymium-iron alloys in the manufacture of permanent magnets.