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:
Dec. 29, 1987
Filed:
Dec. 17, 1985
Applicant:
Inventors:
Assignee:
Sigri GmbH, Augsburg, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; B05D / ; B05D / ;
U.S. Cl.
CPC ...
373 88 ; 427 34 ; 427 78 ; 427294 ; 427299 ; 428336 ; 428688 ;
Abstract
Coating graphite and carbon bodies with a protective layer containing predominantly silicon, by plasma spraying a silicon powder with a grain size under 0.05 mm and with an argon/hydrogen mixture as the plasma gas at reduced atmospheric pressure of at most 200 h Ps. The layer thickness is 0.1 to 0.5 mm and has a density which is at least 95% of the theoretical density. The coated bodies, for instance, graphite electrodes have a lower burnoff rate than unprotected ones in an oxidizing or corrosive atmosphere.