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:
Oct. 16, 2001
Filed:
Feb. 02, 1995
Applicant:
Inventors:
Barry Edward Kinsman, Poole/Dorset, GB;
Richard Hanney, Blandford Forum, GB;
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 1/720 ; C01B 1/743 ;
U.S. Cl.
CPC ...
C01B 1/720 ; C01B 1/743 ;
Abstract
A process for the preparation of metal sulphides includes reacting corresponding metal oxides at temperatures between 500 and 1500° C. in a stream of gaseous CS,characterized in that the CS,is generated from elementary carbon and gaseous H,S by reaction at temperatures between 900 and 1500° C. upstream of the metal oxide. The process furnishes metal sulphides of high purity, thus being of specific usefulness in optical glass materials, for, e.g., fiber optics.