Patents by Inventor Robert C. Carlson

Robert C. Carlson 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).

  • Sulfonated aromatic polyisocyanates and preparation of stable anionic polyurethane or polyurea latices therefor
    Patent number: 3993614
    Abstract: Self-emulsified polyurethane or polyurethane-polyurea or polyurea latices formed by reacting an aromatic polyisocyanate such as a polyurethane prepolymer with a strong sulfonating agent selected from H.sub.2 SO.sub.4, SO.sub.3, ClSO.sub.3 H, and mixtures thereof, converting the sulfonated polyisocyanate to a sulfonic acid salt by reaction with a base, and mixing the polyisocyanate in water to obtain chain extension and self-emulsification thereof.
    Type: Grant
    Filed: November 9, 1973
    Date of Patent: November 23, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Robert C. Carlson
  • Amino terminated ionic polyurethane emulsion with polyepoxide emulsion
    Patent number: 3971745
    Abstract: An aqueous polyurethane emulsion having improved wet strength properties in film form, said aqueous emulsion comprising a blend of an aqueous emulsion comprising an internally emulsified ionic polyurethane polymer with a minor amount of an aqueous emulsion comprising epoxy resin.
    Type: Grant
    Filed: December 21, 1973
    Date of Patent: July 27, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert C. Carlson, Albert H. Stoskopf