Patents by Inventor William L. Harpel

William L. Harpel 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).

  • Metal cleaning method
    Patent number: 5909742
    Abstract: A method of cleaning metal surfaces by using a composition of citric acid, a hydroxycarboxylic acid salt, a nonionic surfactant and a coupling agent is used for cleaning metal surfaces and methods of using the same.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: June 8, 1999
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, Philip D. Deck, William L. Harpel
  • Passivation method and composition for galvanized metal surfaces
    Patent number: 5772740
    Abstract: Compositions and methods for passivating galvanized metal surfaces are disclosed. The addition of a paraffin wax, preferably emulsified with nonionic surfactants to commercial passivation treatment (chrome or non-chrome) enhances passivation.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Passivation method and composition for galvanized metal surfaces
    Patent number: 5700525
    Abstract: Compositions and methods for passivating galvanized metal surfaces are disclosed. The addition of a paraffin wax, preferably emulsified with nonionic surfactants to commercial passivation treatment (non-chrome) enhances passivation.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: December 23, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Composition for and method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metals
    Patent number: 5641537
    Abstract: A process for measuring the coating weight of a dried-in-place non-chromate polyacrylamide 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: July 5, 1995
    Date of Patent: June 24, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Low phosphorous, low etch cleaner and method
    Patent number: 5545347
    Abstract: Compositions and methods for cleaning and etching an aluminum surface with a low etch, low phosphate alkaline cleaner solution are disclosed. The preferred composition employs a stable combination of an alkali metal hydroxide, gluconic acid, a detergent source, an aluminum sequestrant, an oil emulsifier, a defoamer, and a hydrotrope.
    Type: Grant
    Filed: July 18, 1995
    Date of Patent: August 13, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, Edward A. Rodzewich, William L. Harpel
  • Chromium and fluoride free metal treatment
    Patent number: 5518555
    Abstract: A heavy metal and fluoride free pretreatment for a metal surface which enhances corrosion resistance and surface adhesion properties is described. The pretreatment is an aqueous solution of an anionic polyacrylamide which can be rinsed or dried in place.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: May 21, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Visible dried-in-place non-chrome polyacrylamide based treatment for aluminum
    Patent number: 5505792
    Abstract: A method of providing color to a polyacrylamide based, 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 affecting the corrosion resistance or adhesion properties of the conversion coating.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: April 9, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, Philip D. Deck, William L. Harpel, Bruce V. Haberle
  • Composition for and method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metals
    Patent number: 5500053
    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: June 16, 1995
    Date of Patent: March 19, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • Low phosphorous, low etch cleaner and method
    Patent number: 5472630
    Abstract: Compositions and methods for cleaning and etching an aluminum surface with a low etch, low phosphate alkaline cleaner solution are disclosed. The preferred composition employs a stable combination of an alkali metal hydroxide, gluconic acid, a detergent source, an aluminum sequestrant, an oil emulsifier, a defoamer, and a hydrotrope.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: December 5, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, Edward A. Rodzewich, William L. Harpel
  • Composition for a method of monitoring dried-in-place non-chrome polyacrylamide based treatments for metals
    Patent number: 5451270
    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: September 16, 1994
    Date of Patent: September 19, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Jiangbo Ouyang, William L. Harpel
  • 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
  • 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
  • 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
  • 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
  • Low foaming alkaline cleaner comprising a surfactant mixture of an EO-PO-EO block copolymer and a PO-ZO-PO block copolymer
    Patent number: 5114607
    Abstract: A cleaning and etching solution and method for metal surface is disclosed which is an alkaline formulation which includes a surfactant combination of a low foaming ethylene oxide - propylene oxide block copolymer surfactant and a defoaming reverse ethylene oxide - propylene oxide block copolymer. The preferred cleaner includes an alkali metal hydroxide, an alkali metal salt of gluconic acid and preferably an alkali tripolyphosphate and the surfactant combination.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: May 19, 1992
    Assignee: Betz Laboratories, Inc.
    Inventors: Philip D. Deck, Jose B. Rivera, William L. Harpel
  • Hectorite based paint spray booth detackifying slurries and methods of use thereof
    Patent number: 4564464
    Abstract: Paint spray booth detackifying and clarification compositions and methods are disclosed. The compositions are pumpable, hectorite clay containing slurries. In addition to hectorite, which has been proven as a most effective detackifying agent, the slurries include thinning agents such as water soluble aliphatic and/or alicyclic amines. Water conditioning agents, such as water soluble polyphosphates are also made part of the slurry formulation.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: January 14, 1986
    Assignee: Betz Laboratories, Inc.
    Inventors: William L. Harpel, Deborah L. Purnell, Richard J. Pilny
  • Paint spray booth detackification composition and method
    Patent number: 4504395
    Abstract: Paint spray booth detackification compositions and methods are disclosed. The compositions comprise a hectorite clay, an anti-foaming agent and optionally, an aluminum oxide material and a montmorillonite clay. These compositions are introduced into a paint spray booth water wash system so as to detackify oversprayed paint.
    Type: Grant
    Filed: February 7, 1984
    Date of Patent: March 12, 1985
    Assignee: Betz Laboratories, Inc.
    Inventors: William L. Harpel, Richard J. Pilny