Patents Assigned to Subsurface Technology Corp.
  • Porous pipe and process for producing same
    Patent number: 5660209
    Abstract: A process for producing a porous pipe is disclosed and comprises forming an extrudable mixture comprising elastomer particles, binder component and a solid water carrier component having a composition other than the elastomer particles and the binder component and being associated with sufficient water to provide porosity to a porous pipe produced from the mixture; and extruding the extrudable mixture to conditions effective to form the porous pipe.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: August 26, 1997
    Assignee: Subsurface Technology Corp.
    Inventors: James J. Franz, Richard A. Hutchinson