Patents by Inventor Robert Corring

Robert Corring has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5160448
    Abstract: A cleaning composition is provided comprising a cross-linked polycarboxylic polymer and a clay, the combination interacting to provide a gel with certain rheological properties. These properties include a viscosity on a Haake Rotovisco RV-100 Viscometer at 25.degree. C. under 5 sec.sup.-1 shear of from 1,000 to 20,000 cps and under 21 sec.sup.-1 shear of from about 200 to 5,000 cps, with a steady state viscoelastic deformation compliance J.sub.e .degree. greater than 0.01. Preferably, the clay is a hectorite present in an amount from about 0.005 to about 0.1% by weight. Clear gel compositions are herewith obtainable.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: November 3, 1992
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventor: Robert Corring
  • Patent number: 5141664
    Abstract: A cleaning composition is provided comprising a clear gel with opaque particles of an active material uniformly dispersed and suspended within the gel. A surfactant is present in the gel. The active material is surrounded by a protective substance such as an encapsulating layer. Representative of active materials are chlorine and oxygen bleaches, bleach precursors, enzymes, fabric softeners, surfactants, perfumes and mixtures of these materials.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: August 25, 1992
    Assignee: Lever Brothers Company, a Division of Conopco, Inc.
    Inventors: Robert Corring, Robert Gabriel
  • Patent number: 5047167
    Abstract: An aqueous cleaning composition is provided in a gel form having a viscosity on a Haake Rotovisco RV-100 Viscometer at 25.degree. C. under 5 sec.sup.-1 shear of from about 1,000 to 20,000 cps and under 21 sec.sup.-1 shear of from about 200 to 5,000 cps, a pH range from 11 to 13, and a steady state viscoelastic deformation compliance J.sub.e .degree. greater than 0.01, and wherein the light transmittance through a sample 2 cm thick is at least 10%. The composition will incorporate a polycarboxylic polymeric thickener, especially a cross-linked polyacrylic acid. Also present will be a structurant which can either be up to 2% alumina or up to 0.05% hectorite clay. Also present in the composition will be from 0.01 to 20% of an alkyl polyglycoside which ensures improved cleaning and clarity.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: September 10, 1991
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Peter L. Steyn, Robert Corring
  • Patent number: 4836948
    Abstract: A cleaning composition is provided in gel form having a viscosity on a Haake Rotovisco RV-100 Viscometer at 25.degree. C. under 5 sec.sup.-1 shear of from about 1,000 to 20,000 cps and under 21 sec.sup.-1 shear of from about 200 to 5,000 cps, a pH range from 11 to 13, and a steady state viscoelastic deformation compliance J.sub.e .degree. greater than 0.01. In one embodiment, the composition comprises a polycarboxylate polymeric thickener, especially a cross-linked polyacrylic acid. There preferably is also present a trivalent metal containing material, especially an aluminum containing material such as alumina. A structuring chelant is a further preferred component which is selected from the salts of carbonate, pyrophosphate and mixtures thereof. When mixed with the polycarboxylate polymer and trivalent metal material, the structuring chelant can form a clear gel.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: June 6, 1989
    Assignee: Lever Brothers Company
    Inventor: Robert Corring