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:
Dec. 20, 1983
Filed:
Oct. 08, 1981
Applicant:
Inventor:
Malcolm B Burleigh, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
422 57 ; 422 87 ; 422 88 ; 422 66 ; 436122 ; 436131 ; 436132 ; 436162 ;
Abstract
A colorimetric indicator in sheet form comprising an indicator substance, a high surface area carrier for said indicator substance, and a self-adhering clay mineral binder coated on a backing is disclosed. The colorimetric indicator is useful for personal monitors, as end of service life indicators for respirators, thin layer chromatography plates, and vapor transfer sheets.