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:
Jul. 26, 1983
Filed:
May. 11, 1982
Applicant:
Inventors:
Werner Kern, Hightstown, NJ (US);
George L Schnable, Lansdale, PA (US);
Assignee:
RCA Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
156657 ; 156653 ; 156663 ; 252 793 ; 252 794 ;
Abstract
A selective chemical etchant solution for phosphosilicate glass includes a carboxylic acid, hydrogen fluoride and water. The invention is also a method for preferentially etching the phosphosilicate glass which comprises the step of immersing the glasses in the etchant solution of the invention.