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:
Jan. 20, 1987
Filed:
Sep. 08, 1983
Applicant:
Inventor:
Nobushige Arai, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F24J / ; B05D / ;
U.S. Cl.
CPC ...
126417 ; 126901 ; 4273837 ;
Abstract
A selective absorption film selectively absorbing solar rays and composed mainly of cobalt oxide. A blue system selective absorption film having high heat resistance at high temperatures is provided by coating one surface of a metal material of iron or copper with cobalt, and maintaining the cobalt layer in a furnace at an oxidizing atmosphere for a desired time, while supplying water vapor to the furnace maintained in an oxidizing atmosphere so as to carry out an oxidation treatment.