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:
Jan. 25, 1983
Filed:
Feb. 09, 1981
Applicant:
Inventor:
Joseph N Nelson, Waterloo, IA (US);
Assignee:
Engineered Products Company, Waterloo, IA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; G01L / ;
U.S. Cl.
CPC ...
116276 ; 55274 ; 73709 ; 116294 ;
Abstract
An improved air filter restriction indicating device is disclosed for use in connection with an internal combustion engine intake air filtration system. The improvement resides in a novel structure for resetting the indicating device which permits the indicating device to be reliably used in cold, wet environments and in particularly dirty, dusty environments.