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:
Aug. 07, 1979
Filed:
Mar. 30, 1978
Applicant:
Inventors:
Yoshio Nagae, Yokohama, JP;
Takashi Utsumi, Yokohama, JP;
Assignee:
Oxy Metal Industries Corporation, Warren, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; C23F / ;
U.S. Cl.
CPC ...
148-627 ; 148 / ;
Abstract
A chromium-free treatment for aluminum imparts corrosion resistance and paint receptivity to the surface. The process is sequential and includes a first contact with an aqueous alkaline solution (pH above 10) containing complexed iron ion, water rinsing, and then contact with an aqueous acidic organic tannin-containing composition.
Nagae, Yoshio. (1979). Aluminum treatment with alkaline solution and tannin (U.S. Patent No. 4163679). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4163679
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile