Patents by Inventor David Hardman

David Hardman 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).

  • Cationic surfactants
    Publication number: 20060293521
    Abstract: A surfactant comprising a polyether segment including at least one pendant alkoxyfluoroalkyl group, and a cationic substituent defined by one of the formulae: or the substituted derivatives thereof.
    Type: Application
    Filed: June 7, 2006
    Publication date: December 28, 2006
    Inventors: Charles Kausch, Yongsin Kim, Richard Thomas, David Hardman
  • Tobacco conveyor belt
    Patent number: 5857561
    Abstract: A tobacco conveyor belt having a regular nonwoven mesh structure. The belt may incorporate an ultra-violet sensative material.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: January 12, 1999
    Assignee: Scapa Group PLC
    Inventors: David Hardman, Ian Sayers