Patents by Inventor Patrick H. Gill

Patrick H. Gill 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 controlling fouling in cooling tower fill
    Patent number: 5284590
    Abstract: Method for controlling fouling in high efficiency cooling tower fill using low molecular weight 2-acrylamido-2-methylpropyl sulfonic acid/acrylic acid-type polymers.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: February 8, 1994
    Assignee: Calgon Corporation
    Inventors: John F. Kohlhofer, Patrick H. Gill
  • Method for controlling zebra mussels in ship ballast tanks
    Patent number: 5192451
    Abstract: A method for controlling zebra mussels in ship ballast tanks comprising treating ballast water which contains zebra mussels or which is prone to zebra mussel infestation with an effective amount of a water-soluble dialkyl diallyl quaternary ammonium polymer (polyquat). A preferred polymer is a poly(quaternary ammonium) compound having the recurring structure [DMDAAX.sup.-- ] resulting from the polymerization of monomeric dimethyl diallyl ammonium X.sup.--, wherein X.sup.-- is any suitable anion.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: March 9, 1993
    Assignee: Calgon Corporation
    Inventor: Patrick H. Gill
  • Method for controlling zebra mussels in ship ballast tanks
    Patent number: 5128050
    Abstract: A method for controlling zebra mussels in ship ballast tanks comprising treating ballast water which contains zebra mussels or which is prone to zebra mussel infestation with an effective amount of a didecyl dimethyl ammonium halide. A preferred compound is a didecyl dimethyl ammonium chloride.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: July 7, 1992
    Assignee: Calgon Corporation
    Inventor: Patrick H. Gill