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:
May. 01, 1984
Filed:
Mar. 05, 1982
Applicant:
Inventor:
George H Bowser, New Kensington, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; G03B / ;
U.S. Cl.
CPC ...
428 57 ; 1563041 ; 1563043 ; 428 58 ; 428 61 ; 428101 ; 428428 ; 428429 ;
Abstract
Hinged glass photomask assemblies for photolithographic processes are disclosed wherein a flexible polymeric hinge is used in combination with a flexible, non-extensible binding strip which prevents lateral movement of the glass plates thereby providing for repeated use of the phototool without the use of registration systems such as alignment pin assemblies.