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. 02, 1979
Filed:
Dec. 27, 1977
Applicant:
Inventor:
Min H Tsai, Van Nuys, CA (US);
Assignee:
Unitek Corporation, Monrovia, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61C / ; C22C / ;
U.S. Cl.
CPC ...
428450 ; 32-8 ; 75165 ; 427-2 ;
Abstract
A gold alloy for use in a dental restoration, and which maintains a true yellow-gold color after being cast and having a porcelain jacket fired thereon. The alloy is 83-87% gold, 7-12% platinum, 1.5-3.0% rhodium, and less than 1.0% copper. Other elements are included for grain refining, strength, formation of bonding oxide for the ceramic jacket, and the like.