Patents Examined by Thuy M. Bill
  • Bore hole plug
    Patent number: 4674570
    Abstract: There is provided a new and useful bore hole plug comprising a central support member, an expandable sleeve secured about the central support, a first reactant chemical within the sleeve which is capable of reacting with a second reactant chemical or a catalyst to form a closed cell foam, and means by which the second reactant can be introduced to the sleeve.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: June 23, 1987
    Assignee: J.J. Seismic Flowing Hole Control (C.I.) Inc.
    Inventor: Jim Jackson