Patents by Inventor Richard J. Sujdak

Richard J. Sujdak 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).

  • Composition and process for treating metal surfaces
    Patent number: 6291020
    Abstract: A method of forming a hydrophilic coating on a metal surface which includes contacting the metal surface with a substantially silane-free aqueous solution containing a cationic polymer and an alkaline aqueous silicate.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: September 18, 2001
    Assignee: Betzdearborn Inc.
    Inventors: Jeffrey I. Melzer, Richard J. Sujdak
  • Methods for inhibiting the production of slime in aqueous systems
    Patent number: 5695652
    Abstract: Methods for inhibiting the attachment of microbes to surfaces in aqueous systems are disclosed.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: December 9, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Roy Hernandez-Mena, Richard J. Sujdak
  • Methods for inhibiting the production of slime in aqueous systems
    Patent number: 5611939
    Abstract: Methods for inhibiting the attachment of microbes to surfaces in aqueous systems are disclosed. Copolymers of a tannin and a cationic monomer are added to aqueous systems, such as papermaking and cooling water systems, to inhibit microbial attachment to surfaces which cause slime formation problems.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: March 18, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Roy Hernandez-Mena, Richard J. Sujdak, Patric L. Friend
  • Method of conditioning fireside fouling deposits using super large particle size magnesium oxide
    Patent number: 4796548
    Abstract: In a coal fired boiler of the type having a combustion zone in which said coal is fired, a convection zone located downstream from said combustion zone and having a plurality of heater tubes disposed therein adapted to heat water or steam disposed therein, and in which convection zone combustion residues emanating from said coal have a tendency to stick to or agglomerate upon said tubes, a method of decreasing said tendency to stick or agglomerate, comprising burning said coal in the presence of an additive consisting essentially of super large magnesium oxide particles, a major mass fraction of which is about 150 microns in diameter or greater.
    Type: Grant
    Filed: May 8, 1984
    Date of Patent: January 10, 1989
    Assignee: Betz Laboratories, Inc.
    Inventors: Gene A. Merrell, Richard J. Sujdak
  • Cold end additive compositions
    Patent number: 4224180
    Abstract: The present invention is drawn to ethylene polyamines in combination with certain alkanolamines as cold-end additives. More specifically, it has been discovered that if these additives are fed to the moving combustion gases of a combustion system which uses sulfur containing fuel and upstream of cold-end surfaces to be treated, the additive will travel along with the gases as vapor and/or liquid droplets and deposit on the cold-end surfaces. As a result, the amount of sulfuric acid corrosion of metallic cold-end surfaces is reduced.
    Type: Grant
    Filed: October 30, 1979
    Date of Patent: September 23, 1980
    Assignee: Betz Laboratories, Inc.
    Inventor: Richard J. Sujdak
  • Alkanolamines and ethylene polyamines as cold-end additives
    Patent number: 4206172
    Abstract: The present invention is drawn to ethylene polyamines in combination with certain alkanolamines as cold-end additives. More specifically, it has been discovered that if these additives are fed to the moving combustion gases of a combustion system which uses sulfur containing fuel and upstream of cold-end surfaces to be treated, the additive will travel along with the gases as vapor and/or liquid droplets and deposit on the cold-end surfaces. As a result, the amount of sulfuric acid corrosion of metallic cold-end surfaces is reduced.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: June 3, 1980
    Assignee: Betz Laboratories, Inc.
    Inventor: Richard J. Sujdak
  • Ethylene polyamines as cold-end additives
    Patent number: 4185071
    Abstract: A method of reducing the amount of corrosion due to sulfuric acid on metal parts at the cold-end of a combustion system and in contact with combustion gases derived from the combustion of sulfur-containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of an ethylene polyamine additive.
    Type: Grant
    Filed: October 13, 1978
    Date of Patent: January 22, 1980
    Assignee: Betz Laboratories, Inc.
    Inventor: Richard J. Sujdak