Patents by Inventor John D. Puetz

John D. Puetz 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).

  • Formulated copper algaecides
    Patent number: 6069113
    Abstract: A composition comprising a terpene, an emulsifier, and a copper complex is provided, along with methods for its use as an algaecide. The composition is effective when used as an algaecide to treat algae growth in aquatic environments, even though it contains much less terpene than other commonly-used algaecides and can be used without a conventional surfactant. The composition is also less toxic and less flammable than other commonly-used algaecides.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: May 30, 2000
    Assignee: Laporte Water Technologies & Biochem, Inc.
    Inventors: David J. Kierzkowski, John D. Puetz, Gang Wei
  • Water purification
    Patent number: 5306432
    Abstract: A synergistic combination of a water-soluble, antibacterial quaternary ammonium compound and a water-soluble oxidizing agent is found to improve effectiveness in controlling bacterial growth in swimming pool water, particularly hard water.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: April 26, 1994
    Assignee: Great Lakes Biochemical Co., Inc.
    Inventor: John D. Puetz