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:
Sep. 15, 2015
Filed:
Sep. 15, 2011
Applicants:
J. Christopher Thomas, St. Paul, MN (US);
Neal A. Rakow, Woodbury, MN (US);
Duane D. Fansler, Dresser, WI (US);
Inventors:
J. Christopher Thomas, St. Paul, MN (US);
Neal A. Rakow, Woodbury, MN (US);
Duane D. Fansler, Dresser, WI (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/75 (2006.01); G01N 21/78 (2006.01); G01N 31/22 (2006.01); A61B 17/08 (2006.01); A61B 10/00 (2006.01); G01N 35/00 (2006.01); G01N 1/02 (2006.01); G01N 21/77 (2006.01);
U.S. Cl.
CPC ...
G01N 21/783 (2013.01); G01N 31/22 (2013.01); G01N 31/221 (2013.01); A61B 10/0045 (2013.01); A61B 17/083 (2013.01); A61B 17/085 (2013.01); B01L 2200/16 (2013.01); B01L 2300/044 (2013.01); B01L 2300/046 (2013.01); G01N 21/78 (2013.01); G01N 2001/028 (2013.01); G01N 2021/773 (2013.01); G01N 2021/7796 (2013.01); G01N 2035/00108 (2013.01); G01N 2035/00148 (2013.01); Y10T 156/10 (2015.01);
Abstract
Chemical indicators for acidic or basic gases include an inert, porous substrate, an indicator dye or mixture of dyes contained within at least some of the pores of the inert, porous substrate, and an inert adhesive layer attached to the inert, porous substrate. The porous substrate may be a microporous substrate.