J. Christopher Thomas

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St. Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
End of service life indicating systems for layered filter cartridges
- Patent number 9,751,038
- Issue date Sep 5, 2017
- 3M Innovative Properties Company
- Kevin A. Frankel
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Porous chemical indicator for gaseous media
- Patent number 9,134,251
- Issue date Sep 15, 2015
- 3M Innovative Properties Company
- J. Christopher Thomas
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Organic chemical sensor with microporous organosilicate material
- Patent number 8,647,884
- Issue date Feb 11, 2014
- 3M Innovative Properties Company
- J. Christopher Thomas
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
End of Service Life Indicating Systems For Layered Filter Cartridges
- Publication number 20160030877
- Publication date Feb 4, 2016
- 3M INNOVATIVE PROPERTIES COMPANY
- Kevin A. Frankel
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
POROUS CHEMICAL INDICATOR FOR GASEOUS MEDIA
- Publication number 20130189166
- Publication date Jul 25, 2013
- 3M Innovative Properties Company
- J. Christopher Thomas
- G01 - MEASURING TESTING