Patents by Inventor Robert Allan Falk

Robert Allan Falk 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 coated with RF-glycols containing two perfluoroalkylthio groups
    Patent number: 4097642
    Abstract: Perfluoroalkylthio glycols and esters thereof can be prepared by the free-radical catalyzed addition of a perfluoroalkylthiol to an acetylenic alcohol or ester thereof. The compounds obtained are useful intermediates for the synthesis of fluorochemicals with low free surface energies having oil and water repellent properties. In one embodiment, a perfluoroalkylthio glycol can be reacted with a diisocyanate to obtain a polyurethane containing perfluoroalkylthio groups, which polyurethanes are useful as coatings to provide oil and water repellance to textiles and as additives to plastics to provide mold-release and other desirable properties.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: June 27, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Ernest Arthur Dear, Robert Allan Falk
  • Urethanes containing two perfluoroalkylthio groups
    Patent number: 4054592
    Abstract: Perfluoroalkylthio glycols and esters thereof can be prepared by the free-radical catalyzed addition of a perfluoroalkylthiol to an acetylenic alcohol or ester thereof. The compounds obtained are useful intermediates for the synthesis of fluorochemicals with low free surface energies having oil and water repellent properties. In one embodiment, a perfluoroalkylthio glycol can be reacted with a diisocyanate to obtain a polyurethane containing perfluoroalkylthio groups, which polyurethanes are useful as coatings to provide oil and water repellence to textiles and as additives to plastics to provide mold-release and other desirable properties.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: October 18, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Ernest Arthur Dear, Robert Allan Falk
  • RF-glycols containing two perfluoroalkylthio groups and useful compositions therefrom
    Patent number: 4001305
    Abstract: Perfluoroalkylthio glycols and esters thereof can be prepared by the free-radical catalyzed addition of a perfluoroalkylthiol to an acetylenic alcohol or ester thereof. The compounds obtained are useful intermediates for the synthesis of fluorochemicals with low free surface energies having oil and water repellent properties. In one embodiment, a perfluoroalkylthio glycol can be reacted with a diisocyanate to obtain a polyurethane containing perfluoroalkylthio groups, which polyurethanes are useful as coatings to provide oil and water repellence to textiles and as additives to plastics to provide mold-release and other desirable properties.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: January 4, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Ernest Arthur Dear, Robert Allan Falk
  • New R.sub.f -glycols containing two perfluoroalkylthio groups and useful compositions therefrom
    Patent number: 3935277
    Abstract: Perfluoroalkylthio glycols and esters thereof can be prepared by the free-radical catalyzed addition of a perfluoroalkylthiol to an acetylenic alcohol or ester thereof. The compounds obtained are useful intermediates for the synthesis of fluorochemicals with low free surface energies having oil and water repellent properties. In one embodiment, a perfluoroalkylthio glycol can be reacted with a diisocyanate to obtain a polyurethane containing perfluoroalkylthio groups, which polyurethanes are useful as coatings to provide oil and water repellence to textiles and as additives to plastics to provide mold-release and other desirable properties.
    Type: Grant
    Filed: February 4, 1974
    Date of Patent: January 27, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Ernest Arthur Dear, Robert Allan Falk