Patents by Inventor Paul A. Lasseter

Paul A. Lasseter 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).

  • Method of coal degasification
    Patent number: 4471840
    Abstract: A method for producing methane gas and other gases present from a subterranean coal-containing formation comprising the creation of a fracture in the subterranean coal-containing formation, introduction of a propping agent into the open fracture after which at least a portion of the proppant is permitted to settle within the fracture, introduction of a substantially propping agent-free fluid into the open fracture to create an open channel over the propping agent and then permitting closure of the fracture upon the propping agent to leave a propped channel.
    Type: Grant
    Filed: June 23, 1983
    Date of Patent: September 18, 1984
    Inventors: Paul A. Lasseter, Fred C. Hollingsworth