Patents by Inventor Ype Wiersema

Ype Wiersema 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).

  • Fabric softener
    Patent number: 3974076
    Abstract: Liquid fabric softening compositions comprising a water-insoluble quaternary ammonium softener compound, an ethoxylated nonionic surfactant, an alkyl alcohol and other optional components, said compositions being characterized by the small particle size of the softener component which results in more efficient distribution and improved softening activity.
    Type: Grant
    Filed: January 11, 1974
    Date of Patent: August 10, 1976
    Assignee: The Procter & Gamble Company
    Inventors: Ype Wiersema, Ross Dale Rieke