Patents by Inventor Allan P. Evans

Allan P. Evans 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).

  • High concentration slurry-formulation and application
    Patent number: 5565133
    Abstract: A concentrated slurry comprises a high molecular weight polymer, a carrier, a wetting agent, and dispersant. The slurry is characterized by its ability to reduce turbulent flow and skin friction thereby reducing drag of a vessel when the slurry is mixed with water and dispersed in a thin sheet along the surface of a vessel.
    Type: Grant
    Filed: February 16, 1973
    Date of Patent: October 15, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert F. Supcoe, Allan P. Evans
  • High concentration slurry-formulation and application
    Patent number: 5521242
    Abstract: A concentrated slurry comprises a high molecular weight polymer, a carrier, wetting agent, and dispersant. The slurry is characterized by its ability to reduce turbulent flow and skin friction thereby reducing drag of a vessel when the slurry is mixed with water and dispersed in a thin sheet along the surface of a vessel.
    Type: Grant
    Filed: September 30, 1971
    Date of Patent: May 28, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert F. Supcoe, Allan P. Evans