Patents by Inventor Richard Ashley Sinden

Richard Ashley Sinden 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).

  • Mixtures of free halogen-generating biocides, halogen stabilizers and nitrogen containing biocides in water treatment and papermaking applications
    Publication number: 20030029812
    Abstract: The present invention is a method for controlling (e.g. inhibiting) the growth of microorganisms or killing microorganisms in an aqueous solution, such as that found in a water treatment facility or papermaking facility. The method includes adding an effective amount of (a) a free halogen-generating biocide, (b) a halogen stabilizer, and (c) a quaternary ammonium compound, a biocidal amine or salt thereof, or mixture thereof to the aqueous solution. The aqueous solution may be water in a recreational facility, an industrial cooling system, a water treatment facility or a water slurry, such as a circulating water slurry, in a papermaking facility. The mixture of the present invention is useful as a slimicide. The quaternary ammonium biocide and/or biocidal amine increase the efficacy of the free halogen-generating biocidal system.
    Type: Application
    Filed: June 28, 2002
    Publication date: February 13, 2003
    Applicant: LONZA INC.
    Inventors: Thomas Warren Burns, Christopher Hill, Richard Ashley Sinden, Philip Gerdon Sweeny