Patents by Inventor David E. Kramm

David E. Kramm 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).

  • Radiation curable, ethylenically unsaturated thixotropic agent and method of preparation
    Patent number: 4204010
    Abstract: This invention relates to an ethylenically unsaturated reactive thixotropic agent for use in radiation curable compositions, e.g., overprint varnishes, formed by reacting a hydroxyl-containing fatty acid ester with an ethylenically unsaturated isocyanate. The agent not only performs its thixotropic function in the uncured state but also forms part of the cured product on exposure to radiation, e.g., UV radiation due to its substantially similar reactivity.
    Type: Grant
    Filed: December 21, 1978
    Date of Patent: May 20, 1980
    Assignee: W. R. Grace & Co.
    Inventors: David E. Kramm, Arthur D. Ketley
  • Flame retardant mercaptocarboxylic acid esters of halogenated polyols
    Patent number: 4081598
    Abstract: This invention is directed to novel halogen-containing polythiols which impart improved flame retardancy to radiation cured thiol-ene compositions.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: March 28, 1978
    Assignee: W. R. Grace & Co.
    Inventors: Charles R. Morgan, David E. Kramm
  • Flame retardant mercaptocarboxylic acid esters of halogenated aromatic polyols
    Patent number: 4048218
    Abstract: This invention is directed to novel halogen-containing polythiols which impart improved flame retardancy to radiation cured thiol-ene compositions.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: September 13, 1977
    Assignee: W. R. Grace & Co.
    Inventors: Charles R. Morgan, David E. Kramm