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. 04, 1979
Filed:
Oct. 31, 1977
Applicant:
Inventors:
Jacques Lefebvre, Voiron, FR;
Jean-Louis Mazodier, Maisons Laffitte, FR;
Assignee:
Societe de Vente de l'Aluminium Pechiney, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ;
U.S. Cl.
CPC ...
204 25 ; 204 42 ;
Abstract
A piston made of aluminum alloy with its surface treated by anodization in a phosphoric medium, onto which a layer of an anti-friction metal is deposited by electrolysis, so that the piston does not seize on contact with a cylinder with its internal wall made of aluminum alloy.