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. 12, 1979
Filed:
Feb. 21, 1978
Applicant:
Inventors:
Toshimitsu Uchiyama, Sakai, JP;
Minoru Hasegawa, Sakai, JP;
Tatsuo Ootsuka, Sakai, JP;
Hiroshi Matsumoto, Sakai, JP;
Assignee:
Showa Aluminum Kabushiki Kaisha, Sakai, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
427214 ; 427216 ; 1063 / ; 106290 ; 1062 / ;
Abstract
Colored aluminum powder is prepared by immersing finely divided aluminum in a weak alkali solution maintained at a temperature of 50.degree. C. to the boiling point of the solution and having a pH of 8 to 12, said solution containing a salt of iron, nickel, cobalt, zinc or copper, and at least one aliphatic amine having a chelating ability for the metal salt, to form a composite film which consists of a hydrated aluminum oxide and a hydrated oxide of the metal, and separating the aluminum from the solution.