Patents by Inventor Steven E. Dunn

Steven E. Dunn 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).

  • Method for removing rosin soldering flux from a printed wiring board
    Patent number: 5549761
    Abstract: A method for removing rosin soldering flux with aqueous cleaning compositions. The aqueous cleaning compositions can be employed for household use or for cleaning electronic circuit assemblies. The aqueous cleaning compositions contain an alkaline salt, an alkali metal silicate to boost detersive action or to provide corrosion protection to the substrates which are cleaned and an anionic polymer of a high molecular weight polyacrylic acid which stabilizes the alkali metal silicate to prevent precipitation of the silicate from solution.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: August 27, 1996
    Assignee: Church & Dwight Co., Inc.
    Inventors: Anthony E. Winston, Steven E. Dunn, Francis R. Cala, Alfredo Vinci, M. Stephen Lajoie, Robert C. Jorgensen
  • Low foaming effective hydrotrope
    Patent number: 5464553
    Abstract: The present invention relates to environmentally safe aqueous cleaning compositions comprising alkaline salts, organic adjuvants and a hydrotrope comprised of alkali metal salts of carboxylic acids having a chain length of 7-13 carbon atoms so as to maintain the organic adjuvant in solution.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: November 7, 1995
    Assignee: Church & Dwight Co., Inc.
    Inventors: Anthony E. Winston, Francis R. Cala, Steven E. Dunn, Alfredo Vinci, M. Stephen Lajoie
  • Stabilization of silicate solutions
    Patent number: 5433885
    Abstract: The present invention is directed to aqueous cleaning compositions such as for household use or for cleaning electronic circuit assemblies comprising alkaline salt, an alkali metal silicate to boost detersive action or to provide corrosion protection to the substrates which are cleaned and an anionic polymer comprising a high molecular weight polyacrylic acid which stabilizes the alkali metal silicate to prevent precipitation of the silicate from solution.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: July 18, 1995
    Assignee: Church & Dwight Co., Inc.
    Inventors: Anthony E. Winston, Steven E. Dunn, Francis R. Cala, Alfredo Vinci, M. Stephen Lajoie, Robert C. Jorgensen
  • Aqueous cleaning concentrates
    Patent number: 5431847
    Abstract: The present invention is directed to aqueous cleaning concentrates such as for cleaning electronic circuit assemblies comprising 15-30 wt. % of a composition containing alkaline salt, an alkali metal silicate to boost detersive action or to provide corrosion protection to the substrates which are cleaned, an anionic polymer comprising a high molecular weight polyacrylic acid which stabilizes the alkali metal silicate to prevent precipitation of the silicate from solution, surfactants, and a hydrotrope to maintain the surfactants in solution and the balance water.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: July 11, 1995
    Assignee: Charles B. Barris
    Inventors: Anthony E. Winston, Steven E. Dunn, Francis R. Cala, Alfredo Vinci, M. Stephen Lajoie, Robert C. Jorgensen
  • Stabilization of silicate solutions
    Patent number: 5397495
    Abstract: The present invention is directed to aqueous cleaning compositions such as for household use or for cleaning electronic circuit assemblies comprising alkaline salt, an alkali metal silicate to boost detersive action or to provide corrosion protection to the substrates which are cleaned and an anionic polymer which stabilizes the alkali metal silicate to prevent precipitation of the silicate from solution.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: March 14, 1995
    Assignee: Church & Dwight Co. Inc.
    Inventors: Anthony E. Winston, Steven E. Dunn, Francis R. Cala, Alfredo Vinci, M. Stephen LaJoie
  • Low foaming effective hydrotrope
    Patent number: 5264047
    Abstract: The present invention relates to environmentally safe aqueous cleaning compositions comprising alkaline salts, organic adjuvants and a hydrotrope comprised of alkali metal salts of carboxylic acids having a chain length of 7-13 carbon atoms so as to maintain the organic adjuvant in solution.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: November 23, 1993
    Assignee: Church & Dwight Co., Inc.
    Inventors: Anthony E. Winston, Francis R. Cala, Steven E. Dunn, Alfredo Vinci, M. Stephen Lajoie
  • Aqueous electronic circuit assembly cleaner and cleaning method
    Patent number: 5264046
    Abstract: The present invention relates to environmentally safe aqueous flux removing compositions for cleaning electronic circuit assemblies, such as printed circuit or printed wiring boards, during their fabrication. Alkaline salts are utilized preferably with various adjuvants, such as an anti-corrosion agent and antifoam agent to achieve a variety of objectives, among which are the removal of solder flux, oils, waxes, and greasy substances and adhesive and other residues.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: November 23, 1993
    Assignee: Church & Dwight Co., Inc.
    Inventors: Anthony E. Winston, Francis R. Cala, Steven E. Dunn, Alfredo Vinci, M. Stephen Lajoie
  • Stabilization of silicate solutions
    Patent number: 5234505
    Abstract: The present invention is directed to aqueous cleaning compositions such as for household use or for cleaning electronic circuit assemblies comprising alkaline salt, an alkali metal silicate to boost detersive action or to provide corrosion protection to the substrates which are cleaned and an anionic polymer which stabilizes the alkali metal silicate to prevent precipitation of the silicate from solution.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: August 10, 1993
    Assignee: Church & Dwight Co., Inc.
    Inventors: Anthony E. Winston, Steven E. Dunn, Francis R. Cala, Alfredo Vinci, M. Stephen Lajoie
  • Rendering processes
    Patent number: 4966733
    Abstract: A rendering process in which fats and oils are rendered from fat and oil bearing raw materials. The process comprises reducing the particle size of the raw material, heating the reduced raw material in a rendering vessel to a rendering temperature without the introduction of any process water and/or steam while establishing fluidization of the raw material within tallow resident in the rendering vessel and moving a flow of the heated material to a separator.
    Type: Grant
    Filed: April 29, 1986
    Date of Patent: October 30, 1990
    Assignee: The Meat Industry Research Institute of New Zealand
    Inventors: Tissa Fernando, Steven E. Dunn
  • Method for removing soldering flux with alkaline salts, an alkali metal silicate and anionic polymer
    Patent number: RE35017
    Abstract: The present invention is directed to aqueous cleaning compositions such as for household use or for cleaning electronic circuit assemblies comprising alkaline salt, an alkali metal silicate to boost detersive action or to provide corrosion protection to the substrates which are cleaned and an anionic polymer which stabilizes the alkali metal silicate to prevent precipitation of the silicate from solution.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: August 15, 1995
    Assignee: Church & Dwight Co., Inc.
    Inventors: Anthony E. Winston, Francis R. Cala, Steven E. Dunn, Alfredo Vinci, M. Stephen Lajoie
  • Low foaming effective hydrotrope
    Patent number: RE35115
    Abstract: The present invention relates to environmentally safe aqueous cleaning compositions comprising alkaline salts, organic adjuvants and a hydrotrope comprised of alkali metal salts of carboxylic acids having a chain length of 7-13 carbon atoms so as to maintain the organic adjuvant in solution.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: December 12, 1995
    Assignee: Church & Dwight Co. Inc.
    Inventors: Anthony E. Winston, Francis R. Cala, Steven E. Dunn, Alfredo Vinci, M. Stephen Lajoie