Patents by Inventor Johannes Leeuwen

Johannes Leeuwen 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).

  • Bypass flow and ozone proportion method and system
    Publication number: 20060243672
    Abstract: A method and system of ozone treatment diverts a portion of water from a flow of water in a conduit; injects an ozone-containing gas into the portion to provide an ozonated portion; recombines the ozonated portion with the flow of water in the conduit; and regulates the diverted portion to provide a minimum diverted portion flow rate according to flow in the conduit and proportion of ozone in the injected gas.
    Type: Application
    Filed: September 15, 2005
    Publication date: November 2, 2006
    Inventors: Johannes Leeuwen, Michael Jennings, Richard Mueller, Jack Robinson
  • Ozone retention method and system
    Publication number: 20060021951
    Abstract: A method and system of ozone treatment diverts a portion of water from a flow of water in a conduit, injects ozone into the portion to provide an ozonated portion, and recombines the ozonated portion with the flow of water in the conduit. Another method and system identifies a species-destructive reaction product of ozone with a water constituent, determines a life of the reaction product, and contacts ozone with a water containing the species for a period determined according to the determined life of the reaction product.
    Type: Application
    Filed: September 21, 2005
    Publication date: February 2, 2006
    Inventors: Johannes Leeuwen, Michael Jennings, Richard Mueller, Jack Robinson
  • Detergent compostions inhibiting dye transfer comprising copolymers of n-vinylimidazole and n-vinylpyrrolidone
    Patent number: 5710118
    Abstract: A detergent composition comprises clay, a surfactant system and a copolymer of N-vinylimidazole and N-vinylpyrrolidone. The copolymer is present in the detergent composition in an amount of 0.01% to 10.0% by weight. The copolymer has an average molecular weight of from 5,000 to 50,000 and a molar ratio of N-vinylimidazole to N-vinylpyrrolidone of from 1:1 to 1:02.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: January 20, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Alfred Busch, Andre Christian Convents, Petrus Johannes Leeuwen