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:
May. 09, 1995
Filed:
Jul. 12, 1991
George D Case, Portland, OR (US);
Paul J Bekowies, Staten Island, NY (US);
Resource Technologies Group, Inc., Morgantown, WV (US);
Abstract
A metabolically active biological component having mixed function oxidation activity. e.g., microsomal P-450 oxidase enzyme complex, is effective in the presence of NADPH and moisture when dispersed in a thin film of a generally neutral hydrophilic film-forming binder. e.g., gelatin, to convert a broad spectrum of carcinogenic substances, into metabolic intermediates, which can be detected, preferably by a colorimetric indicator present in the binder film or an adjacent binder film and undergoing a visible color change. The film or films can be carried, e.g., as spots by a suitable support. e.g., glass or plastic sheet forming a direct-acting self-contained badge-type indicator. The colorimetric indicator is preferably a chemically reduced dye precursor of a polyarylmethane dye or analog thereof, e.g., pararosaniline or malachite green. Such reduced dye precursors are effective colorimetric indicators for organic compounds containing an epoxide structure generally as well as epoxy-containing metabolic intermediates.