Patents by Inventor Robert J. Purinton, Jr.

Robert J. Purinton, Jr. 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).

  • Aqueous crosslinked gelled pigs for cleaning pipelines
    Patent number: 4543131
    Abstract: Pipeline interiors are cleaned by passing a gelled pig containing an aqueous, cross-linked gelled galactomannan gum, or derivative thereof, through the pipeline. Additives can be included in the gelled pig to enhance stability, cleaning ability, etc. The gelled pigs are particularly effective when used in pig trains containing one or more chemical pig segments in the train.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: September 24, 1985
    Assignee: The Dow Chemical Company
    Inventor: Robert J. Purinton, Jr.
  • Organic gels
    Patent number: 4537700
    Abstract: Organic gels are described which comprise (a) a nonpolar, liquid, organic solvent and (b) a gelling amount of a mixture of (1) an alkyl oleyl phosphate and (2) an alkali metal aluminate. The gels have many uses, one of which is as a gelled pig for pipeline cleaning.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: August 27, 1985
    Assignee: The Dow Chemical Company
    Inventor: Robert J. Purinton, Jr.
  • Cleaning pipeline interior with gelled pig
    Patent number: 4473408
    Abstract: Organic gels comprising (a) a nonpolar, liquid, organic solvent and (b) a gelling amount of a mixture of (1) an alkyl oleyl phosphate and (2) an alkali metal aluminate. The gels have many uses, one of which is as a gelled pig for pipeline cleaning.
    Type: Grant
    Filed: January 12, 1982
    Date of Patent: September 25, 1984
    Assignee: The Dow Chemical Company
    Inventor: Robert J. Purinton, Jr.
  • Method for drying pipelines
    Patent number: 4254559
    Abstract: The interior surface of a pipeline is dried by sequentially passing through the pipeline (a) an aqueous cross-linked gelled pig, (b) a fluid mobility buffer comprising a non-crosslinked gelled ankanol of from one to three carbon atoms, (c) a dessicating amount of a liquid alkanol from one to three carbon atoms. For example, a pipeline was dried by sequentially passing through it (a) a borate cross-linked hydroxypropyl guar gum pig, (b) a fluid mobility buffer comprising methanol thickened with hydroxypropyl cellulose, and (c) methanol.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: March 10, 1981
    Assignee: The Dow Chemical Company
    Inventor: Robert J. Purinton, Jr.