Patents by Inventor Reginald V. Scowen

Reginald V. Scowen 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: 4954292
    Abstract: A detergent composition contains(i) an anionic detergent active material;(ii) polyvinyl pyrrolidone; and(iii) a nonionic material or a mixture of nonionic materials, the nonionic material or its mixture having an HLB of not more than 10.5The polyvinyl pyrrolidone and the nonionic material are present to reduce redeposition of suspended soil onto fabrics washed with this composition.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: September 4, 1990
    Assignee: Lever Brothers Co.
    Inventors: Michael Hull, Reginald V. Scowen
  • Patent number: 4711740
    Abstract: A detergent composition containing a detergent active, sodium carbonate and calcite also contains a copolymer to reduce deposition of insoluble material on fabrics. The copolymer is derived from a carboxylic monomer and a non-carboxylic monomer, with the non-carboxylic monomer being in excess. A 3:1 copolymer of sulphonated styrene and maleic anhydride is exemplified.
    Type: Grant
    Filed: May 23, 1986
    Date of Patent: December 8, 1987
    Assignee: Lever Brothers Company
    Inventors: Malcolm N. A. Carter, Reginald V. Scowen
  • Patent number: 4514185
    Abstract: Fabric, particularly soiled fabrics containing calcium carbonate crystal growth poisons, may be washed in hard water to which has been added a detergent active material and an alkali metal carbonate if a secondary detergency builder is added after a defined critical state of the system is reached. The secondary builder may be a precipitating, sequestering or ion exchange builder, and is added in such an amount which would be insufficient, in the absence of the carbonate, to reduce the free calcium ion concentration to less than 10.sup.-5 molar. The delayed addition can be achieved by separate dosing, coating the secondary builder, dosing the composition in the form of a two-compartment sachet or forming the secondary builder material in situ. The composition may include a material, such as calcite, to promote the occurrance of the critical state.
    Type: Grant
    Filed: June 11, 1982
    Date of Patent: April 30, 1985
    Assignee: Lever Brothers Company
    Inventors: Robert S. Lee, Reginald V. Scowen
  • Patent number: 4325829
    Abstract: A particulate detergent composition for fabric conditioning includes, in addition to a detergency active material, from 10-40% of a mixture of tripolyphosphate and orthophosphate in the ratio of 20:1 to 3:1 together with 2-25% of a mixture of soap and an anionic polyelectrolyte in the ratio of 10:1 to 1:1. Any pyrophosphate present must be kept below 5%. The soap and polyelectrolyte result in reduced deposition of inorganic materials onto the fabrics. The preferred polyelectrolyte is sodium polyacrylate with a molecular weight of about 27,000. The composition may also include conventional additional ingredients.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: April 20, 1982
    Assignee: Lever Brothers Company
    Inventors: Peter M. Duggleby, Bernhard Kueter, Ronald M. Morris, Horst Poeselt, Hermann Rabitsch, Reginald V. Scowen