Patents by Inventor John A. Landess

John A. Landess 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 and solvent composition for stimulating the production of oil from a producing well
    Patent number: 4090562
    Abstract: A method and solvent composition for removing viscous crude oil, waxes, asphaltenes and resin precipitates of petroleum origin from oil wells, flow lines and pore spaces of oil-bearing formations. The solvent composition is a mixture of about 45 to about 85 volume percent of a nornally liquid aliphatic hydrocarbon boiling in the range of about 120.degree. F. to about 550.degree. F., between about 5 to 45 volume percent of a normally liquid aromatic hydrocarbon, between about 0.5 to about 6 volume percent of an ether of an aliphatic polyhydric alcohol, and between about 1 to about 15 volume percent of a lower alkyl monohydric alcohol.
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: May 23, 1978
    Assignee: Union Oil Company of California
    Inventors: George P. Maly, John A. Landess, Thomas Foral
  • Method and solvent composition for stimulating the production of oil from a producing well
    Patent number: 3998743
    Abstract: A method and solvent composition for removing viscous crude oil, waxes, asphaltenes and resin precipitates of petroleum origin from oil wells, flow lines and pore spaces of oil-bearing formations. The solvent composition is a mixture of about 45 to about 85 volume percent of a normally liquid aliphatic hydrocarbon boiling in the range of about 120.degree. F. to about 550.degree. F., between about 5 to 45 volume percent of a normally liquid aromatic hydrocarbon, between about 0.5 to about 6 volume percent of an ether of an aliphatic polyhydric alcohol, and between about 1 to about 15 volume percent of a lower alkyl monohydric alcohol.
    Type: Grant
    Filed: December 7, 1973
    Date of Patent: December 21, 1976
    Assignee: Union Oil Company of California
    Inventors: George P. Maly, John A. Landess, deceased, Thomas Foral