Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Reuben Harel0
John L. Creed0
John P. Custer0
Kenneth L. Kessler0
Date of Patent
April 10, 2007
Patent Application Number
11065417
Date Filed
February 24, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
A residual life indicating system for a filter includes a main filter, a sampling filter, and a sensor. Both the main filter and the sampling filter receive an ambient gas meant to be filtered. The sensor connects to the sampling filter and senses the presence of a predetermined chemical in the gas that has been filtered by the sampling filter.
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