Patents by Inventor Rudolph G. DiFilipantonio

Rudolph G. DiFilipantonio 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).

  • Coating fibrous substrates with fluoropolymer amphoteric polymer and surfactants
    Patent number: 4595518
    Abstract: Process for imparting oil- and water-repellency to fibrous substrates, particularly polypropylene upholstery fabric, which comprises applying thereto an effective amount of a composition prepared by first combining one or more fluorocarbon dispersions or polyfluoroalkyl-containing polymeric latexes containing an anionic surfactant with a nonionic surfactant having an HLB of 15.+-.3 and then with an amphoteric polymer in an amount sufficient to make the composition slightly cationic, thereby facilitating deposition of said composition to said substrate. An anionic surfactant-containing elastomeric latex may be added so as to impart abrasion resistance.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: June 17, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Stuart Raynolds, Rudolph G. DiFilipantonio