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. 10, 1985
Filed:
Mar. 08, 1984
Applicant:
Inventor:
Richard K Gray, Warren, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
523458 ; 148 3157 ; 148103 ; 523457 ;
Abstract
Novel epoxy compositions and a method of using them to make bonded rare earth-iron alloy magnets have been developed. The epoxy resins are polyglycidyl ethers of polyphenol alkanes that have high glass transition temperatures. The epoxy resin is provided in the form of a powder containing a suitable amount of a latent imidazole curing agent. The powder is mixed with rare earth-iron alloy particles, the mixture is compacted, and the resultant compact is heated to melt the powder and activate the curing agent. The alloy particles in the resultant magnet body are exceptionally resistant to flux loss upon aging.