Patents by Inventor Granville D. Edwards

Granville D. Edwards 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).

  • Epoxy resin system for insitu rehabilitation of pipes
    Patent number: 5104691
    Abstract: An epoxy resin/curing agent composition is provided comprising (i) at least one liquid epoxy resin, (ii) a reactive epoxy-functional diluent, (iii) a thixotroping agent, (iv) a polyamide resin, (v) a polyalkylenediamine, and (vi) 2-ethyl-4-methyl imidazole or derivatives thereof. The composition is suitable for use in in situ coating and rehabilitation processes and can withstand service at elevated temperatures.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: April 14, 1992
    Assignee: Shell Oil Company
    Inventors: Granville D. Edwards, Bonita S. Wilson
  • Epoxy resin system for insitu rehabilitation of pipes
    Patent number: 5081168
    Abstract: An epoxy resin/curing agent composition is provided comprising (i) at least one liquid epoxy resin, (ii) a reactive epoxy-functional diluent, (iii) a thixotroping atent, (iv) a polyamide resin, (v) a polyalkylenediamine, and (vi) 2-ethyl-4-methyl imidazole or derivaties thereof. The composition is suitable for use in insitu coating and rehabilitation processes and can withstand service at elevated temperatures.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: January 14, 1992
    Assignee: Shell Oil Company
    Inventors: Granville D. Edwards, Bonita S. Wilson