Patents by Inventor Hans R. Falkenburg

Hans R. Falkenburg 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).

  • Curing agents
    Patent number: 4391965
    Abstract: A modified polycarboxylic acid polyanhydride curing agent suitable for curing epoxy resins which is prepared by reacting a polycarboxylic acid anhydride with a monohydroxy compound ROH; and coating compositions, comprising the modified curing agent and a solution of an epoxy resin to be cured, which have improved storage stability.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: July 5, 1983
    Assignees: Imperial Chemical Industries PLC, Hermann Wiederhold G.m.b.H. Corp.
    Inventors: Hans R. Falkenburg, Siegfried Krause, Robert C. McGuiness
  • Coating compositions
    Patent number: 4379909
    Abstract: Coating lacquers, particularly useful for coating cans, comprise an epoxide resin, a polycarboxylic acid anhydride curing agent, an organic solvent and an accelerator derived from melamine, benzoguanamine or glycoluril. Particularly useful accelerators are the formaldehyde condensates of these materials and their ethers. The coatings are non-toxic and are cured at temperatures lower than conventional.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: April 12, 1983
    Assignees: Hermann Wiederhold GmbH Corp., Imperial Chemical Industries PLC
    Inventors: Hans R. Falkenburg, Siegfried Krause, Robert C. McGuiness