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:
Mar. 25, 1986
Filed:
Apr. 24, 1985
Applicant:
Inventors:
Yutaka Kuroyama, Chita, JP;
Masatada Araki, Handa, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423446 ; 423461 ;
Abstract
Diamond can be easily purified from a powdery mixture of diamond and graphite by heating the mixture together with ammonium nitrate and at least one metal oxide of lead monoxide, trilead tetroxide, magnesium oxide and zinc oxide, to oxidize the graphite powder, and removing the oxidized graphite.