Patents Represented by Law Firm Spencer & Franl
  • Charge liner for hollow explosive charges
    Patent number: 4557771
    Abstract: The invention relates to lining material for a hollow explosive charge with increased effectiveness mainly for the perforation of pipes of hydrocarbon-producing wells.The lining material according to the invention consists of alloy with bismuth content and/or metal mixture with bismuth content and/or elementary bismuth.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: December 10, 1985
    Assignees: Orszagos Koolaj es Gazipari Troszt, s Robbanoanyag Felugyelet
    Inventors: Gyozo Bencz, Janos Deres, Peter Tuti