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:
Dec. 21, 1982
Filed:
Dec. 28, 1981
Applicant:
Inventor:
David A Christensen, Crystal Lake, IL (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; H01H / ;
U.S. Cl.
CPC ...
200306 ; 2001 / ; 200 / ;
Abstract
A membrane switch, which is vented to equalize air pressures within and outside the switch, includes a scavenger material in the vent passage selected to react with airborne contaminants and prevent or substantially reduce their passage into the area of the switch contacts.