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:
Sep. 25, 1984
Filed:
Jun. 23, 1983
Applicant:
Inventors:
Olli V Hyvarinen, Suoniityntie, FI;
Leo E Lindroos, Annikintie, FI;
Eino A Rosenberg, Honkalantie, FI;
Assignee:
Dutokumpu Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75-7 ; 423508 ; 423510 ;
Abstract
The invention concerns a procedure for separating selenium from seleniferous raw material by roasting this material with oxygen at elevated temperature in enclosed space. With a view to improving the separation of selenium, the roasting is carried out in the presence of oxides of sulphur.