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. 18, 1985
Filed:
Aug. 13, 1982
Applicant:
Inventor:
Jen-chi Huang, Ossining, NY (US);
Assignee:
Polychrome Corporation, Yonkers, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03F / ;
U.S. Cl.
CPC ...
430302 ; 430278 ; 101459 ; 1014631 ; 204 33 ; 156665 ;
Abstract
The method of production of lithographic aluminum substrates which comprises first mechanically graining a surface of an aluminum sheet to obtain a pumice grained surface and then etching with a hot sulfuric acid (10-90%) solution.