Tile Council of America, Inc.

American Cyanamid Company

The Ohio State University

David R Burley

Allan J Robertson

William A Rickelton

Arthur J Epstein

Jiang Yue

Frank E Bernett

Christopher J Brookes

Broadly, the present invention takes advantage of the ability of self-protonated sulfonated polyaniline (SPAN) to sense and/or modulate pH of a medium in the vicinity of a SPAN electrode. Accordingly, one aspect of the present invention is directed to a method for sensing pH of a medium in the vicinity of a sensing electrode wherein a SPAN electrode and a counter-electrode are placed in a medium and an indicia of said SAN correlative with the pH of said medium is monitored. As another aspect of the present invention, the pH of a medium in the vicinity of a sensing electrode is modulated by placing a SPAN electrode in the medium and applying a voltage to the electrode to controllably emit or absorb protons from said electrode to modulate the pH of the medium in the vicinity of the electrode. As a further aspect of the present invention, the activity/state of a biosensor/catalyst is sensed for the activity/state correlative with pH. As a further aspect of the present invention, the activity/state of a biosensor/catalyst, where the activity/state is correlative with pH, is controlled by associating the biosensor/catalyst with a SPAN electrode in contact with a medium containing said biosensor/catalyst, and applying a voltage to said electrode to controllably emit or absorb protons from said electrode to control the activity/state of said biosensor/catalyst.

Proton concentration sensor/modulator for sulfonated and hydroxylated

A composite floor covering comprising a rubbery backing strip or layer in intimate contact with the floor, ceramic tiles placed over the backing layer and flexible grouting between the tiles.

Resilient ceramic tile flooring

Cobalt(II)-bearing aqueous solutions may be treated with an extractant comprising an organic-soluble phophinic acid, or a salt thereof, to separate the cobalt(II) from the aqueous solution. Typical extraction techniques compatible with the instant process include liquid-liquid extraction employing either mixer settlers or columns, packed beds of supported extractants as in ion exchange, liquid membrane extraction and selective supported membrane extraction.

Extractant for the selective removal of cobalt(II) from aqueous solutions

Cobalt(II)-, nickel(II)-bearing aqueous solutions may be treated with an extractant comprising an organic-soluble phosphinic acid, or a salt thereof, to separate the cobalt(II) from the aqueous solution. Typical extraction techniques compatible with the instant process include liquid- liquid extraction employing either mixer settlers or columns, packed beds of supported extractants as in ion exchange, liquid membrane extraction and selective supported membrane extraction.

Selective extraction of cobalt(II) from aqueous solutions with

Cobalt(II)-bearing aqueous solutions may be treated with an extractant comprising an organic-soluble phosphinic acid, or a salt thereof, to separate the cobalt(II) from the aqueous solution. Typical extraction techniques compatible with the instant process include liquid-liquid extraction employing either mixer settlers or columns, packed beds of supported extractants as in ion exchange, liquid membrane extraction and selective supported membrane extraction.

Selective removal of cobalt(II) from aqueous solutions with phosphinic

Adhesive dressing compositions are disclosed which are useful in restoring and improving adhesive joint surfaces such as grout surfaces in ceramic tile installations by easy, efficient methods. Such compositions form stain resistant, water repellent, washable coverings which adhere to most adhesive surfaces and further have properties of preferential adherability to certain adhesive surfaces compared with adjacent adherend surfaces. The compositions comprise a polymer in the form of an emulsion, an alkali-thickenable polymer, an alkaline material and water with other components including pigments, plasticizers and solvents.

Method of using adhesive joint dressing compositions and product

The use of alpha-substituted-2-hydroxy-3-naphthoic acids to replace part of the conventional 2-hydroxy-3-naphthoic acid coupling component results in improved azo dyes.

Modifier composition for azo pigments based on 2-hydroxy-3-naphthoic acid

Adhesive joint dressing compositions and methods of using same

Adhesive joint dressing compositions containing an alkali thickenable

Hydraulic cementitious compositions are disclosed which have as an additive to provide sag resistance a compound selected from among magnesium oxide having an iodine number of greater than twenty or magnesium hydroxide.

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Cranbury, NJ, United States of America

David R Burley