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:
Apr. 05, 1988
Filed:
Apr. 27, 1987
Applicant:
Inventors:
Jen-Chi Huang, Mount Kisco, NY (US);
Donald Riley, Tenafly, NJ (US);
Assignee:
Polychrome Corporation, Yonkers, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25F / ;
U.S. Cl.
CPC ...
20412943 ; 20412975 ;
Abstract
A method for producing aluminum sheets for lithographic plates by electrolytically etching the surface in an aqueous mineral acid electrolyte solution utilizing direct current with superimposed alternating current. The surface of aluminum plate sheets may be mechanically grained prior to the step of electrolytic etching.