Patents by Inventor Chester D. Szymanski

Chester D. Szymanski 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).

  • Fluid loss control agents for drilling fluids containing divalent cations
    Patent number: 4600515
    Abstract: Low and high solids drilling fluids containing high levels (i.e., at least 10,000 ppm) of divalent cations are provided with improved fluid loss control by employing high molecular weight water-in-oil emulsion copolymers of acrylamide and a water soluble salt of acrylic acid. The copolymers, produced by the copolymerization in water-in-oil emulsions form of acrylamide and acrylic acid or the salt thereof in molar ratios of 70:30 to 95:5 are particularly effective in drilling fluids containing high levels of calcium ions.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: July 15, 1986
    Assignee: National Starch and Chemical Corporation
    Inventors: Patricia A. Gleason, Chester D. Szymanski
  • Process for reacting quaternary ammonium monomer in the presence of anionic polymers
    Patent number: 4517351
    Abstract: Quaternary ammonium monomers and monomers copolymerizable therewith are reacted in the presence of anionic polymers to directly form a dry coacervate by a process which comprises forming a solution comprising the monomer(s), the anionic polymer, solvent(s) and a free-radical initiator and simultaneously polymerizing and drying the solution at a temperature above the boiling point of the solvent.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: May 14, 1985
    Assignee: National Starch and Chemical Corporation
    Inventors: Chester D. Szymanski, Dennis Neigel
  • Cementiferous compositions
    Patent number: 4473406
    Abstract: This invention provides cementiferous compositions having improved flow characterisitics which are given by the incorporation of certain hydroxy acrylate copolymers. Typical copolymers are of acrylic or methacrylic acid with a hydroxyalkyl acrylate or methacrylate and are used preferably in the range 0.01% to 2.5% w/w on the cement in the cementiferous composition. This invention also provides novel additive compositions for use in the cementiferous compositions.
    Type: Grant
    Filed: June 8, 1983
    Date of Patent: September 25, 1984
    Assignee: National Starch and Chemical Corporation
    Inventors: Geoffrey Bradley, Chester D. Szymanski
  • Process for reacting quaternary ammonium monomers in the presence of anionic polymers
    Patent number: 4455408
    Abstract: Quaternary ammonium monomers and monomers copoylmerizable therewith are reacted in the presence of anionic polymers to directly form a dry coacervate by a process which comprises forming a solution comprising the monomer(s), the anionic polymer, solvent(s) and a free-radical initiator and simultaneously polymerizing and drying the solution at a temperature above the boiling point of the solvent.
    Type: Grant
    Filed: August 11, 1982
    Date of Patent: June 19, 1984
    Assignee: National Starch and Chemical Corporation
    Inventors: Chester D. Szymanski, Dennis Neigel
  • Contraceptive composition
    Patent number: 4432967
    Abstract: A contraceptive composition for vaginal administration which contains a salt of a sulfonated styrene polymer and a pharmaceutically acceptable carrier. Effective polymers have a degree of substitution of from about 0.7 to 1.3 and an average molecular weight of between 600 and 7,000,000.
    Type: Grant
    Filed: June 25, 1982
    Date of Patent: February 21, 1984
    Assignee: National Starch and Chemical Corp.
    Inventor: Chester D. Szymanski
  • Wash-resistant antistatic coating compositions
    Patent number: 4041001
    Abstract: A method for preparing wash-resistant antistatic synthetic fibrous substrates and compositions utilized therefor are disclosed. The method comprises applying a novel antistatic composition comprising a sulfonated polymer and a polyhydroxy organic compound to a synthetic fibrous substrate, curing the antistatic composition and thereby forming a wash-resistant antistatic coating for the substrate.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: August 9, 1977
    Assignee: National Starch and Chemical Corporation
    Inventors: Chester D. Szymanski, Ronald DeMartino
  • Method of treating ulcer
    Patent number: 3961045
    Abstract: Water-soluble homo-and co-polymers of styrene and salts thereof having a degree of substitution from about 0.7 to about 1.3 sulfonate groups per unit of styrene are useful for treating gastric or duodenal ulcers.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: June 1, 1976
    Assignee: National Starch and Chemical Corporation
    Inventors: Otto B. Wurzburg, Chester D. Szymanski, Leo Kruger