Patents by Inventor Alvin J. Kieft

Alvin J. Kieft 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).

  • Sandable polyurethane adhesive composition and laminates made therewith
    Patent number: 4097442
    Abstract: A polyurethane adhesive that is sandable when cured, the adhesive being the reaction product of a mixture of about one mol of a polyester polyol or polyether polyol of 2-4 hydroxyls having a molecular weight of 500 to about 3000 and 2.5 to 7 mols of isocyanate composition of a mixture of toluene diisocyanate and methane di(phenyl isocyanate) containing a filler composed of silica platelets and glass spherical platelets, a plasticizer amount of polyvinyl chloride plasticizer and a curative amount of monomeric nitrogen containing tetraol of 200 to 1000 molecular weight.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: June 27, 1978
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Alvin J. Kieft, Richard L. Cline, Thomas G. Rabito
  • Two-part primer system for FRP bonding
    Patent number: 4004050
    Abstract: An improved adhesion between polyester compositions per se or metals using the isocyanate-type adhesive is obtained by first treating the surface of the polyester composition and/or metal with a first and a second treating agent without regard to sequence where the first treating agent is an organic polyisocyanate and the second treating agent is a tertiary amine.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: January 18, 1977
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Thomas G. Rabito, Alvin J. Kieft, Richard L. Cline