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:
Jun. 26, 2012
Filed:
Mar. 06, 2008
Gregory W. Peterson, Belcamp, MD (US);
Christopher J. Karwacki, Churchville, MD (US);
David Friday, Baltimore, MD (US);
Marc Shrewsbury, Perryville, MD (US);
Gregory W. Peterson, Belcamp, MD (US);
Christopher J. Karwacki, Churchville, MD (US);
David Friday, Baltimore, MD (US);
Marc Shrewsbury, Perryville, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A residual life indicator for determining the residual life of a filter has a first sample filter with an inlet coupleable to an inlet of the filter whose residual life is to be determined, a second sample filter having an inlet coupleable to an outlet of the filter whose residual life is to be determined, a chemical tracer source selectively coupled to the inlets of the first and second sample filters, and a detector selectively coupled to outlets of the first and second filters.