Patents by Inventor David C. Hippe

David C. Hippe 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).

  • Process for treating tissue paper with tri-component biodegradable softener composition
    Patent number: 5385642
    Abstract: A process for making tissue papers, in particular pattern densified tissue papers, having an enhanced tactile sense of softness when treated with tri-component biodegradable softener compositions are disclosed. These tri-component softener compositions comprise nonionic softeners, nonionic surfactant compatibilizers and polyhydroxy compounds. The weight ratio of the nonionic softeners to the nonionic surfactant compatibilizers ranges typically from about 10:1 to 1:10. The weight ratio of the nonionic softeners to the polyhydroxy compounds ranges typically from about 10:1 to 1:10. The tri-component biodegradable softeners are typically applied from an aqueous dispersion to at least one surface of the dry tissue paper web.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: January 31, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Dean Van Phan, Paul D. Trokhan, David C. Hippe