Patents by Inventor John K. Marshall

John K. Marshall 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).

  • Furling sail with protective panels
    Patent number: 4383492
    Abstract: A triangular sail is provided with vertical seams and panels at the leech and foot to protect the sail upon furling around the luff, the foot panel also serving to impart shape to the sail.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: May 17, 1983
    Inventors: Gerald W. Harris, John K. Marshall
  • Detergent compositions
    Patent number: 4088612
    Abstract: A detergent composition comprising a sulphobetaine, which can be prepared by reaction between a sultone and a tertiary amine, and an anionic detergent active compound in a molar ratio of at least 1 part to 2 parts, respectively. The compositions are effective in the absence of a detergency builder.
    Type: Grant
    Filed: January 4, 1977
    Date of Patent: May 9, 1978
    Assignee: Lever Brothers Company
    Inventors: Malcolm N. A. Carter, Brian McGhee, John F. Helliwell, John K. Marshall, Appayya R. Naik