Patents Represented by Attorney Steven D. Boyd

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  • Method of monitoring dried-in-place non-chrome polyacrylamide based treatments for aluminum
    Patent number: 5401333
    Abstract: A process for measuring the coating weight of a dried-in-place non-chromate polyacrylamide/surfactant based conversion coating is disclosed. An ammonium hexafluorotitanate tracer added to such a conversion coating was found to not adversely affect coating properties. The tracer was found to remain proportional to the polymer matrix when the coating was analyzed by X-ray fluorescence.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: March 28, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Method and composition for treatment of aluminum
    Patent number: 5391238
    Abstract: Methods of forming a dried in place conversion coating on metal surfaces such as aluminum and aluminum alloys. The methods comprise contacting the metal with an aqueous solution of a water soluble maleic or acrylic acid/allyl ether copolymer alone or with an acid.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: February 21, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: David W. Reichgott, Fu Chen
  • Composition and process for treating metal surfaces
    Patent number: 5389405
    Abstract: A non-chromate conversion coating for metal surfaces such as aluminum, steel, galvanized steel and zinc-aluminum steel consisting of an aqueous solution of a cationic polymer, an alkaline aqueous silicate and an organofunctional silane.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: February 14, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Deborah L. Purnell, Brenda S. Morris, David W. Reichgott
  • Composition for controlling scale formation in aqueous systems
    Patent number: 5378390
    Abstract: A method and composition for controlling the formation and deposition of scale forming salts in a circulating aqueous system is described wherein a treatment solution of a substoichiometric amount of polyepoxysuccinic acid in combination with agaric acid is employed.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: January 3, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Libardo A. Perez, Donald T. Freese, Judith B. Rockett, William S. Carey
  • Corrosion control composition and method for boiler/condensate steam system
    Patent number: 5368775
    Abstract: A corrosion control composition and method for boiler/condensate steam systems is provided. Corrosion is controlled by the addition to the feedwater of a relatively high molecular weight amine. The high molecular weight amine is formulated so that at the conditions of temperature and pressure in the boiler/condensate steam system, partial degradation into more volatile amines occurs. The resulting blend of neutralizing amines provides the superior corrosion control of a blend of neutralizing amines from a single amine feed. The preferred high molecular weight amine is dimethylaminopropylamine which will partially degrade into dimethylamine, trimethylamine, methylamine, and dimethylaminopropanol.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: November 29, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Anthony M. Rossi, Alexander C. Mc Donald
  • Methods of controlling scale formation in the presence of metal ions in aqueous systems
    Patent number: 5368740
    Abstract: A method of inhibiting scale formation in acidic aqueous systems where metal ions such as A1.sup.+3 or Fe.sup.+3 are present by employing a polyepoxysuccinic acid in combination with a metal ion binding material.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: November 29, 1994
    Assignee: Betz PaperChem, Inc.
    Inventors: Davor F. Zidovec, Alexander D. Fisher
  • Non-chromium passivation method and composition for galvanized metal surfaces
    Patent number: 5344505
    Abstract: A substantially chromium free composition and method for passivating a galvanized metal surface is disclosed. The passivation treatment which may be rinsed or dried-in-place includes phosphoric acid, boric acid and optionally molybdic acid.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: September 6, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Treatment for galvanized metal
    Patent number: 5344504
    Abstract: An aqueous coating solution for zinc containing metals such as galvanized iron and steel. The coating solution is resistent to the formation of zinc induced sludge and can be operated with little or no overflow. The aqueous treatment solution contains from 0.1 to 10 grams per liter of a fluorometallic acid, from 0.015 to 6 grams per liter of a salt of a transition metal, from 1 to 30 grams per liter zinc; and optionally from 0.1 to 3 grams per liter a polymer of acrylic acid, methacrylic acid, or an ester thereof with a C1 to C8 alkanol.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: September 6, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Philip D. Deck, Jeffrey I. Melzer, William L. Harpel
  • Compositions for controlling scale formation in aqueous system
    Patent number: 5342540
    Abstract: The treatment of an aqueous system to inhibit scale formation with a polyepoxysuccinic acid scale inhibitor, an acrylic acid copolymer and a lanthanide ion blending agent.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: August 30, 1994
    Assignee: Betz Laboratories, Inc.
    Inventor: Libardo A. Perez
  • Method and composition for treatment of metals
    Patent number: 5328525
    Abstract: A non-chromate pretreatment for aluminum and zinc-aluminum galvanized steel is disclosed which comprises a polyacrylic acid or homopolymers and copolymers thereof, a molybdate, and a dihydrohexafluo acid.
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: July 12, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Edward M. Musingo, Bruce V. Haberle, Philip D. Deck
  • Methods for controlling scale formation in aqueous systems
    Patent number: 5326478
    Abstract: A method of controlling the formation and deposition of scale forming salts in a circulating aqueous system is described wherein a treatment solution of a substoichiometric amount of polyepoxysuccinic acid in combination with agaric acid is employed.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: July 5, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Libardo A. Perez, Donald T. Freese, Judith B. Rockett, William S. Carey
  • Method of inhibiting calcium oxalate scale deposition
    Patent number: 5320757
    Abstract: Hydrolyzed copolymers (A) maleic anhydride with (B) at least one more ethylenically unsaturated monomer other than acrylic acid or methacrylic acid or with a mixture of (B) and (C) acrylic acid or methacrylic acid are employed in a process to inhibit calcium oxalate formation and deposition.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: June 14, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Davor F. Zidovec, Alexander D. Fisher
  • Corrosion inhibition of calcium chloride brine
    Patent number: 5292455
    Abstract: A method of inhibiting corrosion of metals such as low carbon steel in contact with calcium chloride brine comprising adding to the brine or to the salt prior to dissolution 2-hydroxyphosphono-acetic acid.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: March 8, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Suzanne M. Zefferi, Roger C. May
  • Method and composition for treatment of aluminum
    Patent number: 5292379
    Abstract: Methods of forming a dried in place conversion coating on metal surfaces such as aluminum and aluminum alloys. The methods comprise contacting the metal with an aqueous solution of a water soluble maleic or acrylic acid/allyl ether copolymer alone or with an acid.
    Type: Grant
    Filed: June 19, 1992
    Date of Patent: March 8, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: David W. Reichgott, Fu Chen
  • Visible dried-in-place non-chrome treatment for aluminum
    Patent number: 5292378
    Abstract: A method of providing color to a dried-in-place, non-chromate conversion coating is provided. The addition of a phthalo green pigment and optionally a nonionic surfactant to an aqueous, dried-in-place conversion coating treatment solution provides for a colored conversion coating without adversely effecting the corrosion resistance or adhesion properties of the conversion coating.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: March 8, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, Bruce V. Haberle, Philip D. Deck, William L. Harpel
  • Quaternized polyvinylamine water clarification agents
    Patent number: 5292441
    Abstract: The use of quaternized polyvinylamines for use in water clarification is disclosed.
    Type: Grant
    Filed: January 12, 1993
    Date of Patent: March 8, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Jen-Chi Chen, Stephen R. Vasconcellos, Gerald C. Walterick, Jr., Fu Chen
  • Dewatering gluten with nonionic surfactants
    Patent number: 5283322
    Abstract: Methods of enhancing the dewatering of gluten are disclosed. The methods comprise adding a nonionic surfactant to the wet gluten prior to dewatering, as in vacuum dewatering equipment. Particularly effective surfactants are oxyalkylated sorbiton R surfactants when R is monooleate, trioleate, monostearate, tristearate, monopalmitate and monolaurate.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: February 1, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: Roy W. Martin, Robert J. Denton
  • Method and composition for treatment of galvanized steel
    Patent number: 5282905
    Abstract: Methods of forming a conversion coating on metal surfaces such as galvanized steel are provided. The methods comprise reacting the metal surface with an aqueous solution of a water soluble polyacrylic acid or homopolymer thereof, maleic or acrylic acid/allyl ether copolymer alone or with an acid.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: February 1, 1994
    Assignee: Betz Laboratories, Inc.
    Inventors: David W. Reichgott, Fu Chen
  • Lubricating metal cleaner additive
    Patent number: 5282992
    Abstract: An additive for a single stage aqueous alkaline cleaning composition for metal surfaces which imparts improved lubricity to the metal surfaces being treated. The additive is a fatty amine, preferably an ethoxylated fatty diamine.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: February 1, 1994
    Assignee: Betz Laboratories, Inc.
    Inventor: David W. Reichgott
  • Method for removing benzene from effluent wash water in a two stage crude oil desalting process
    Patent number: 5271841
    Abstract: Methods of diminishing the benzene content of the effluent wash water in a two stage crude oil desalting system are disclosed. The first stage desalter is operated at "low", near ambient temperatures with decreased mixing of crude oil and wash water and increased addition of demulsifier. The second stage is operated at "hot" temperatures of prior processes with increased mixing of the crude oil and wash water. The effluent wash water has a substantially diminished benzene content compared to prior two-stage desalting systems.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: December 21, 1993
    Assignee: Betz Laboratories, Inc.
    Inventor: Paul R. Hart