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. 30, 1978
Filed:
Jul. 11, 1975
Robert E Baier, Buffalo, NY (US);
Vito A DePalma, Tonawanda, NY (US);
Calspan Corporation, Buffalo, NY (US);
Abstract
A scuff-resistant, waterproof environmental quality indicator suitable for field use to blot-test unknown spills or wet containers, as field markers of spray distribution, as floating markers of water contamination, as personnel protection badges and as integrating dosimeters. The environmental quality indicator has a topographically varying surface having substantially uniformly located raised portions defining the scuffing and abrasion level and relieved portions beneath the scuffing and abrasion level to protect the indicator formulation from physical environmental hazards, which can produce an initial false indication, while remaining freely exposed to chemical environmental hazards.