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:
Jun. 23, 1981
Filed:
May. 12, 1980
Applicant:
Inventor:
James A Charles, Stapleford, GB;
Assignees:
Metallurgical Processes Limited, both of, BS;
I.S.C. Smelting, both of, BS;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
75256 ; 75-3 ; 75-7 ; 428403 ;
Abstract
A substantially spherical pellet composed predominantly of lead sulphide which is coated with predominantly zinc sulphide material. The lead sulphide core is from 2-6 mm in diameter and the zinc sulphide coating has a thickness of from 1-3 mm. The weight ratio of zinc sulphide to lead sulphide is from 1.5:1 to 2.5:1.