Patents by Inventor David W. Reichgott

David W. Reichgott 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).

  • Patent number: 5863464
    Abstract: The use of halo-benzotriazoles as corrosion inhibitors in aqueous systems is disclosed. Halo-benzotriazoles such as chloro-tolyltriazole and bromo-tolyltriazole were found to be more effective corrosion inhibitors than tolyltriazole in the presence of chlorine.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: January 26, 1999
    Assignee: BetzDearborn Inc.
    Inventors: David W. Reichgott, Sydia B. Anderson, Michael A. Cady, Roger C. May, Anita G. Monino
  • Patent number: 5863463
    Abstract: The use of halo-benzotriazoles as corrosion inhibitors in aqueous systems is disclosed. Halo-benzotriazoles such as chloro-tolyltriazole and bromo-tolyltriazole were found to be more effective corrosion inhibitors than tolyltriazole in the presence of chlorine.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: January 26, 1999
    Assignee: BetzDearborn Inc.
    Inventors: David W. Reichgott, Sydia B. Anderson, Michael A. Cady, Roger C. May, Anita G. Monino
  • Patent number: 5772919
    Abstract: The use of halo-benzotriazoles as corrosion inhibitors in aqueous systems is disclosed. Halo-benzotriazoles such as chloro-tolyltriazole and bromo-tolyltriazole were found to be more effective corrosion inhibitors than tolyltriazole in the presence of chlorine.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventors: David W. Reichgott, Sydia B. Anderson, Michael A. Cady, Roger C. May, Anita G. Monino
  • Patent number: 5612421
    Abstract: Methods and compositions for pretreating a metal surface are provided. The methods comprise applying to the metal surface a hydrolysate of a copolymer of an unsaturated carboxylic acid or derivative thereof and a vinyltrialkoxysilane compound. Novel zinc salt hydrolysate compositions and zirconium salt hydrolysate compositions are also disclosed.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: March 18, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Alan E. Goliaszewski, David W. Reichgott, Lothar S. Sander
  • Patent number: 5518770
    Abstract: Methods and compositions for pretreating a metal surface are provided. The methods comprise applying to the metal surface a hydrolysate of a copolymer of an unsaturated carboxylic acid or derivative thereof and a vinyltrialkoxysilane compound. Novel zinc salt hydrolysate compositions and zirconium salt hydrolysate compositions are also disclosed.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: May 21, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Alan E. Goliaszewski, David W. Reichgott, Lothar S. Sander
  • Patent number: 5451431
    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: October 31, 1994
    Date of Patent: September 19, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Deborah L. Purnell, Brenda S. Morris, David W. Reichgott
  • Patent number: 5412011
    Abstract: A non-chromium conversion coating for metal surfaces such as aluminum, steel, galvanized steel and zinc-aluminum steel consisting of an aqueous solution of an anionic polyacrylamide copolymer, an inorganic silicate and an organofunctional silane.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: May 2, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Brenda S. Morris, Jiangbo Ouyang, David W. Reichgott
  • 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
  • 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
  • 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
  • Patent number: 5286300
    Abstract: A composition useful as a rinse aid for metal surfaces and for improving the mobility of formed metal surfaces is described. The composition comprises(A) from about 10 to about 90% by weight of at least one nonionic polyoxyalkylene glycol comprising poly(oxypropylene) hydrophobic groups and poly(oxyethylene) hydrophilic groups, and(B) from about 10 to about 90% by weight of at least one alkoxy derivative of at least one ethoxylated and propoxylated glycol, and particularly at least one nonionic polyoxyalkylene glycol comprising poly(oxypropylene) hydrophobic groups and poly(oxyethylene) hydrophilic groups. A process is also described for improving the drainage of water from metal surfaces and for improving the mobility of formed metal surfaces. The process comprises contacting said metal surface with an aqueous composition comprising water and the above-described composition.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: February 15, 1994
    Assignee: Man-Gill Chemical Company
    Inventors: Michael D. Hnatin, David W. Reichgott
  • 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
  • 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
  • Patent number: 5158622
    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: February 12, 1991
    Date of Patent: October 27, 1992
    Assignee: Betz Laboratories, Inc.
    Inventors: David W. Reichgott, Fu Chen
  • Patent number: 5147472
    Abstract: A method and composition for sealing of a conversion coating is disclosed. The method includes contacting a metal substrate, to which has been applied a conversion coating, with an aqueous solution including a heterocyclic alcohol. The preferred heterocyclic alcohol is tetrahydro-2-furanmethanol. The sealer may dry in place or be followed by a water rinse.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: September 15, 1992
    Assignee: Betz Laboratories, Inc.
    Inventor: David W. Reichgott
  • Patent number: 5129967
    Abstract: A chromate and phosphate free composition and method for forming a dried in place conversion coating for aluminum and aluminum alloys. The method entails the application of the composition to aluminum or aluminum alloys and allowing the composition to dry in place. The composition is an acidic aqueous solution preferably containing more than 8 grams per liter dihydrohexafluozirconic acid, more than 10 grams per liter polyacrylic acid and more than 0.17 grams per liter hydrofluoric acid in a ratio of 1:0.84:0.014. Up to about 0.6 gram per liter dihydrohexafluotitanic acid is added to facilitate analytical testing in aqueous systems. The solution forms a dried in place conversion coating having a weight of from 6 to 25 milligrams per square foot in treatment (contact and drying) times as short as 2 seconds.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: July 14, 1992
    Assignee: Betz Laboratories, Inc.
    Inventors: Lothar S. Sander, Edward M. Musingo, William J. Neill, David W. Reichgott
  • Patent number: 5112413
    Abstract: Methods for treating metal surfaces including contacting the surface with a water soluble or water dispersible polymer comprising a repeat unit (a) having the structure ##STR1## or salt form of said repeat unit, wherein R and R.sub.1 are the same or different and are independently chosen from C.sub.1 -C.sub.3 lower alkylene and wherein z is an integer of from 1-3. The methods also include use of copolymers having in addition to repeat unit (a) above, a repeat unit (b) having the structure ##STR2## from wherein X is OH, NH.sub.2, or OM wherein M is a cation, the molar ration of (a.sub.1):(b) being present in said copolymer being from about 20:1 to 1:20. The methods provide chromium free rinse solutions for use in rinsing phosphate-based conversion coated metal surfaces.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: May 12, 1992
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Fu Chen, David W. Reichgott
  • Patent number: 5061389
    Abstract: A composition and process for reducing the coefficient of friction on the surface of formed metal structures, such as aluminum cans, by lubricating the surface with a blend of a polyethylene glycol ester with a fluoride compound.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: October 29, 1991
    Assignee: Man-Gill Chemical Co.
    Inventor: David W. Reichgott
  • Patent number: 4917737
    Abstract: Method and composition for sealing of a phosphate conversion coating is disclosed. The method includes contacting a phosphate conversion coating with an acidic aqueous solution of substituted iminodimethylene diphosphonic acids represented, as a class, by the formula R1--N--(CH.sub.2 --PO.sub.3 H.sub.2).sub.2 where R1 is a Z, alkyl or aryl moiety having a carbon chain up to the length where solubility in an acidic aqueous solution is lost. Z is ##STR1## where R2 and R3 are hydrogen, alkyl, aryl, or phosphono alkyl moieties, m is from 1 to 3 and Cn is a methylene carbon chain up to the length where solubility in an acidic aqueous solution is lost, and water soluble salts thereof. Preferably, R1 is methyl through octyl, benzyl, or diethylenediaminotrimethylene triphosphonic acid. The substituted iminodimethylene diphosphonic acid is applied as an aqueous bath with a pH of from about 3.3 to 4.0. The substituted iminodimethylene diphosphonic acid may dry in place or be followed by a deionized water rinse.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: April 17, 1990
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, David W. Reichgott
  • Patent number: 4789406
    Abstract: Methods for removing iron oxide and other accumulated corrosion products from metal surfaces in contact with aqueous systems, such as cooling water systems, are disclosed. The method steps can be performed without requirement of system shutdown and without requirement of acidic conditions. The methods comprise contacting the corroded surface with an organic reductant/chelant and an inorganic reducing agent while the pH of the aqueous system is maintained within the substantially neutral range of about 6.5-7.5. Pyrogallol and methyl gallate may be used as the organic reductant/chelant.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: December 6, 1988
    Assignee: Betz Laboratories, Inc.
    Inventors: E. Paul Holder, Frederick C. Klaessig, Pamela J. Peerce-Landers, David W. Reichgott