Patents by Inventor Leo V. Woytiuk

Leo V. Woytiuk 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).

  • Inside telecommunication cable
    Patent number: 4562302
    Abstract: An inside cable having a core of conductors with conductor insulation formed from polyvinylchloride and in which interstices between conductors contains a fire resistant powder to resist burning of the core. The core is surrounded by a fire resistant jacket and the cable is devoid of a tubular metal shield or sheath surrounding the core.
    Type: Grant
    Filed: December 21, 1982
    Date of Patent: December 31, 1985
    Assignee: Northern Telecom Limited
    Inventors: John A. Checkland, Leo V. Woytiuk
  • Water blocked electric cables
    Patent number: RE30715
    Abstract: An electric cable having a multi-stranded core of insulated conductors and a jacket, in which the spaces between and around the conductors are at least partially filled with a mixture which forms a blockage to the penetration of water. The mixture comprises water repellant treated calcium carbonate and high molecular weight polyacrylamide resin which do not react with each other or when in contact with water. Preferably the individual conductors are coated with a hydrophobic liquid such as a low viscosity paraffinic oil.
    Type: Grant
    Filed: November 1, 1978
    Date of Patent: August 18, 1981
    Assignee: Northern Telecom Limited
    Inventor: Leo V. Woytiuk