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. 06, 1986
Filed:
Oct. 31, 1983
Gilbert K Meloy, Cincinnati, OH (US);
Twinoak Products, Inc., Plano, IL (US);
Abstract
A process for producing a color display means of the type used for detecting the depletion of a cleaning and disinfecting ingredient in a solution such as the water present in a toilet tank and bowl. The display means comprises a solid composition which includes a color indicator in a matrix, and this composition is located in the solution along with the cleaning and disinfecting ingredient. The cleaning and disinfecting ingredient has a bleaching tendency relative to the color indicator so that a display of color is minimal or non-existent for as long as significant amounts of the ingredient are present. The color indicator will, however, provide a substantial display of color after depletion of the ingredient whereby depletion of the ingredient can be detected. The porosity of the solid composition is maintained within limits to provide a means for controlling the rate of release of the color indicator into the solution. This porosity is controlled by a manufacturing process which minimizes the introduction of air and provides a homogenous blend. The compacting of the solid composition into a cake-like structure is then regulated on a pressure and time basis.