Patents by Inventor Charles F. Sikorski

Charles F. Sikorski 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).

  • Production of concentrated aqueous polyphosphate solutions
    Patent number: 5035871
    Abstract: A concentrated aqueous alkali metal polyphosphate solution is prepared by adding polyphosphoric acid having a P.sub.2 O.sub.5 assay of about 82% to about 85% to a quantity of concentrated aqueous alkali metal hydroxide sufficient to neutralize the acid. The resulting polyphosphate solution is richer in pyrophosphate and tripolyphosphate moieties than the acid.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: July 30, 1991
    Assignee: FMC Corporation
    Inventors: Charles F. Sikorski, John W. DeMarco
  • Oil well completion fluid
    Patent number: 4521316
    Abstract: A well-treating fluid of high density, solids-free and corrosion-resistance is formed comprising an aqueous solution of at least 50% by weight tetrapotassium pyrophosphate and a salt which can be either monopotassium orthophosphate, dipotassium orthophosphate or tripotassium orthophosphate, or mixtures thereof, wherein the salt is present in amounts sufficient to yield a predetermined pH in said fluid of about 8.5 to about 12, a predetermined specific gravity of at least about 1.65, and has high resistance to recrystallization of its solutes.
    Type: Grant
    Filed: March 11, 1983
    Date of Patent: June 4, 1985
    Assignee: FMC Corporation
    Inventor: Charles F. Sikorski