Patents by Inventor Petrina F. Fridd

Petrina F. Fridd 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).

  • Coloring keratinous material
    Patent number: 4898595
    Abstract: The specification discloses a process for coloring hair in which certain polysiloxanes including siloxane units having a silicon bonded hydroxy group are employed to provide improved depth of color or color retention. Preferably the polysiloxanes are employed as a treatment on hair prior to or after application of colorant.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: February 6, 1990
    Assignee: Dow Corning Limited
    Inventors: Petrina F. Fridd, Rosemary M. Taylor
  • Compositions and process for treating hair
    Patent number: 4601902
    Abstract: A hair treating composition which comprises (1) a silane or a polydiorganosiloxane having quaternary ammonium substituted groups attached to silicon, (2) a polydiorganosiloxane having silicon-bonded substituents which are amino-substituted hydrocarbon groups, (3) one or more surfactants, and (4) water. The compositions can be formulated as e.g. hair conditioning agents or as shampoos.
    Type: Grant
    Filed: July 19, 1984
    Date of Patent: July 22, 1986
    Assignee: Dow Corning Ltd.
    Inventors: Petrina F. Fridd, Rosemary M. Taylor, Michael P. Hill
  • Compositions for treating hair and other fibrous materials
    Patent number: 4337166
    Abstract: A detergent composition, particularly for use as a hair shampoo, consisting of a detergent substance, for example one based on a fatty alcohol or a fatty alcohol ethoxylate, and from 0.5 to 20 percent by weight, based on the total composition, of a cyclic methyl siloxane.The presence of the cyclic siloxane results in reduced drying time of the washed fibres.
    Type: Grant
    Filed: April 17, 1981
    Date of Patent: June 29, 1982
    Assignee: Dow Corning Limited
    Inventors: Michael P. L. Hill, Petrina F. Fridd