Patents by Inventor Wade K. Cunningham

Wade K. Cunningham 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).

  • Substrate reinforced rubber structure and compound for forming same
    Patent number: 4014827
    Abstract: Reaction products of phenol and hexamethylenetetramine act as methylene donors in rubber compounds containing acceptors such as free resorcinol or precondensed resorcinol-formaldehyde (RF) resins. The products of reaction between this methylene donor and various methylene acceptors produce excellent adhesion between the rubber compounds and reinforcing substrates. Reinforcement of the rubber compound is obtained and this donor does not cause degradation of polyester cord used as a reinforcing substrate.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: March 29, 1977
    Assignee: United States Pipe and Foundry Company
    Inventors: David R. Hart, Wade K. Cunningham