Patents by Inventor Peter H. Howarth

Peter H. Howarth 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).

  • Aerosol valve with a surfactant impregnated valve seal
    Patent number: 5427282
    Abstract: An aerosol valve having a valve ferrule, a valve stem, and at least one valve seal, in which the valve seal is impregnated with a physiologically acceptable surfactant. The valves of the invention exhibit improved force-to-fire and improved return force compared to valves containing untreated valve seals.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: June 27, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: David J. Greenleaf, Peter H. Howarth, Philip A. Jinks