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. 07, 1993
Filed:
May. 05, 1992
Lanny U Franklin, Flowery Branch, GA (US);
Mary E Sachs, Palatine, IL (US);
Anitox Corporation, Buford, GA (US);
American Colloid Company, Arlington Heights, IL (US);
Abstract
A pH-indicating material capable of undergoing a clearly visually detectable color transition at a desired pH, e.g., at a pH at or below about 5.6 and/or at a pH at or above about 7.6. When the pH-indicating material is wetted on its surface with liquid animal dross, particularly animal urine, such as cat urine, the pH-indicating material will undergo a clearly visible color transition at a urine-problematic pH, e.g., acidic or alkaline. The pH-indicating material is maintained on an inert carrier, separate from the cat litter material itself, so that the cat litter material does not chemically interfere with the urine pH-induced color transition provided by the dye(s) in the coating material, and so that the color transition is an exclusive result of the pH of the contacting animal urine, without pH interference from the litter material. In a preferred embodiment, the pH-indicating material is admixed with any cat litter material and has dual indicators that provide one color transition at a low pH and a different color transition at a high pH so that acidic or alkaline animal urine problems can be visibly detected upon contact between the animal urine and the pH-indicating material.