Patents by Inventor Donald S. Close

Donald S. Close 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).

  • Novel foam compositions
    Patent number: 4892891
    Abstract: Foam compositions with improved physical characteristics are from urethane prepolymers in the presence of various modifying agents. Blowing agents employed in the presence of surfactants make it possible to obtain either open or closed cell structures, and the degree of foam stiffness may be desirably controlled with polyols, as well as with polymeric polymethylene polyphenylisocyanates. Suitable modifying agents include asphalts, portland cement, epichlorohydrin, other epoxidized compounds, additional polymers, and various other materials.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: January 9, 1990
    Assignee: Syn-Coat Enterprises
    Inventor: Donald S. Close
  • Adhesive system
    Patent number: 4822835
    Abstract: Adhesive systems particularly useful for adhering epichlorohydrin elastomers, comprise solutions of urethane polymers, amino silane coupling agents, and epoxy silane coupling agents in organic solvents.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: April 18, 1989
    Assignee: Syn-Coat Enterprises, Inc.
    Inventor: Donald S. Close
  • Protective and adhesive compositions
    Patent number: 4742119
    Abstract: Adhesive compositions are shown made from mixtures of EPDM and halogenated butyl rubber compounds. The mixture may either be dissolved in solvents and applied as adhesive solutions, or they may be incorporated with tackifiers and formed into adhesive tapes. The compositions are particularly useful in adhering strips of EPDM membrane roofing to each other; however, they may also be used as protective coatings and linings.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: May 3, 1988
    Assignee: Syn-Coat Enterprises, Inc.
    Inventor: Donald S. Close