Patents by Inventor Phillip Douglas Shows

Phillip Douglas Shows 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).

  • Process for the preparation of water blocking tapes and their use in cable manufacture
    Patent number: 6348236
    Abstract: A process for the manufacture of a water blocking tape for use in cable manufacture, which process comprises the steps of: (i) forming a coating of an aqueous solution of a water soluble polymer containing anionic groups and a multivalent ionic crosslinking agent on at least one surface of a substrate material selected from the group consisting of a metal foil, a plastic film, a plastic sheet, a multilayer film, and a laminate of at least two thereof; and (ii) drying and/or curing the coating in order to form a partially crosslinked water swellable polymer coating on the at least one surface of the substrate material. Water blocking tapes are also provided which comprise a substrate material having a coating on at least one surface thereof of a water soluble polymer containing anionic groups which is partially crosslinked with a multivalent ionic crosslinking agent. The preferred water soluble polymer containing anionic groups is an acrylic or methacrylic acid (co)polymer.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: February 19, 2002
    Assignee: Neptco, Inc.
    Inventors: Stuart Paterson Fairgrieve, Jennifer Clare Watts, Joel David Gruhn, Phillip Douglas Shows
  • Process for the preparation of nonwoven water blocking tapes and their use in cable manufacture
    Patent number: 6284367
    Abstract: A process for the manufacture of a nonwoven water blocking tape for use in cable manufacture, which process comprises the steps of: (i) forming a coating of an aqueous solution of a water soluble polymer containing anionic groups and a multivalent ionic crosslinking agent on at least one surface of a nonwoven substrate material; and (ii) drying and/or curing the coating in order to form a partially crosslinked water swellable polymer coating on the at least one surface of the nonwoven substrate material. Water blocking tapes are also provided which comprise a nonwoven substrate material having a coating on at least one surface thereof of a water soluble polymer containing anionic groups which is partially crosslinked with a multivalent ionic crosslinking agent.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: September 4, 2001
    Assignee: Neptco, Inc.
    Inventors: Joel David Gruhn, Phillip Douglas Shows, Stuart P. Fairgrieve, Jennifer Clare Watts