Patents by Inventor Virgil A. Josendal

Virgil A. Josendal 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 for the enhanced recovery of oil and natural gas
    Patent number: 4393936
    Abstract: A method for the enhanced recovery of both natural gas and liquid petroleum from hydrocarbon-containing subterranean formations, particularly dipping subterranean formations, by the consecutive steps of introducing a gaseous displacement fluid to recover natural gas and thereafter introducing an oil-miscible displacement fluid to recover undrained oil and/or other liquid petroleum.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: July 19, 1983
    Assignee: Union Oil Company of California
    Inventor: Virgil A. Josendal