Patents by Inventor Deborah L. Purnell

Deborah L. Purnell 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: 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
  • 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
  • Water soluble graft copolymers for paint spray booth sludge dewatering
    Patent number: 5385676
    Abstract: A method of dewatering paint spray booth sludge by adding to the water system of a paint spray booth a water soluble graft copolymer having the structure: ##STR1## wherein E is the repeat unit obtained after polymerization of an, ethylenically unsaturated compound, the molar percentage of a:b is from about 95:5 to 5:95, with the proviso that the sum of a and b equals 100%; G comprises the structure: ##STR2## wherein d is a cationic monomer, R.sub.1, R.sub.2 and R.sub.3 are the same or different and are hydrogen or a lower alkyl group having C.sub.1 to C.sub.3, F is the salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: January 31, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Wen P. Liao, Deborah L. Purnell
  • On-line blending method for activator catalyzed paint detackification program
    Patent number: 5250190
    Abstract: In a paint spray booth wherein water is used to collect oversprayed paint, a process for detackifying and coagulating the oversprayed paint by the addition of specific amounts of specific anions and cationic polymers blended prior to addition to the water system.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: October 5, 1993
    Assignee: Betz Laboratories, Inc.
    Inventors: Mitchell J. Kassouf, Daniel W. Yankovich, Jr., Deborah L. Purnell
  • Organofunctional silane paint coagulants and detackifiers
    Patent number: 5169539
    Abstract: A method and composition for detackifying or coagulating and flocculating waterborne and solventborne paints with organofunctional silane compounds.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: December 8, 1992
    Assignee: Betz Laboratories, Inc.
    Inventors: Rachel Turoscy, Deborah L. Purnell
  • One drum activator catalyzed paint detackification program
    Patent number: 5147558
    Abstract: In a paint spray booth wherein water is used to collect oversprayed paint, a process for detackifying and coagulating the oversprayed paint by the addition of specific amounts of specific anions and cationic polymers blended prior to addition to the water system.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: September 15, 1992
    Assignee: Betz Laboratories, Inc.
    Inventor: Deborah L. Purnell
  • Paint spray booth treatment program for water base and water base and water base blended with oil base paints
    Patent number: 5147557
    Abstract: A process for the detackification and coagulation of oversprayed water-borne and mixed water-borne and oil based paint particles in the water collection system of a paint spray booth comprising adding a unitary blend of an inorganic anion and a cationic polymer selected from the group consisting of polydiallyl dimethyl ammonium chloride, a condensation product of dimethylamine plus epichlorohydrin and a condensation product of dimethylamine plus ethylene diamine plus epichlorohydrin.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: September 15, 1992
    Assignee: Betz Laboratories, Inc.
    Inventor: Deborah L. Purnell
  • Paint spray booth treatment
    Patent number: 4853132
    Abstract: This invention relates to an improved method for treating paint wastes and paint oversprays encountered in wet paint spray booths or any areas where these wastes and oversprays exist.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: August 1, 1989
    Assignee: Betz Laboratories, Inc.
    Inventors: Gene A. Merrell, Deborah L. Purnell
  • 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