Patents by Inventor Valerie Lawton

Valerie Lawton 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: 6274542
    Abstract: Storage stable aqueous acidic solutions, often having a pH of up to 1 containing an ester peracid and/or an acid peracid can be obtained by reacting a diester satisfying the general formula R1—O—CO—R2—CO—O—R3 in which R1 and R3 each represents a alkyl group containing from 1 to 4 carbon atoms which may the same of different and R2 represents an aliphatic alkylene group optionally unsaturated which may be linear or branched containing from 2 to 6 carbon atoms with aqueous hydrogen peroxide in the presence of an acid, such as sulphuric acid and permitting the compositions to progress towards equilibrium concentrations. By starting with a diester, perhydrolysis generates an ester peracid which is a particularly effective peracid. The process can be controlled to produce solutions containing a high peracid content and within a wide range of ratios of ester peracid to acid peracid.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: August 14, 2001
    Assignee: Solvay Interox Limited
    Inventors: Graham Carr, Alun P. James, Kelly J. Morton, John P. Sankey, Valerie Lawton
  • Patent number: 4086203
    Abstract: A fibrous product comprises a core component which may be inorganic or organic, and a sheath component, said sheath component being a composite polymeric material comprising polyurethane and polyester and/or vinyl polymer. The sheath component may be applied to the core in the form of a gel polymerizate comprising polyurethane precursors or a polyurethane together with a polyester resin precursor comprising an ethylenically unsaturated polyester and an ethylenically unsaturated monomer.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: April 25, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Bryan Shaw, Valerie Lawton, James McAinsh