Patents by Inventor Denis E. Hassick

Denis E. Hassick 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).

  • Publication number: 20040014989
    Abstract: A coagulant which is the reaction product of a trivalent metal salt, excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids and various impurities in most water treatment applications.
    Type: Application
    Filed: July 10, 2003
    Publication date: January 22, 2004
    Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J Guerrini
  • Patent number: 6656377
    Abstract: A coagulant which is the reaction product of a trivalent metal salt, excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids and various impurities in most water treatment applications.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: December 2, 2003
    Assignee: Calgon Corporation
    Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
  • Publication number: 20020130087
    Abstract: A coagulant which is the reaction product of a trivalent metal salt, excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids and various impurities in most water treatment applications.
    Type: Application
    Filed: May 21, 2001
    Publication date: September 19, 2002
    Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
  • Patent number: 6306308
    Abstract: A coagulant which is the reaction product of a trivalent metal salt (eg., FeCl3), excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids and various impurities in most water treatment applications.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: October 23, 2001
    Assignee: Nalco Chemical Company
    Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
  • Patent number: 6184257
    Abstract: The present invention provides a novel formulation in a composition comprising FeCl3 and a dialkyl diallyl ammonium polymer where the FeCl3 has been diluted with water prior to being mixed with the polymer providing a stable composition.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: February 6, 2001
    Assignee: Calgon Corporation
    Inventor: Denis E. Hassick
  • Patent number: 5948270
    Abstract: A method for reducing turbidity in laundry waste water comprising the steps of treating said water with effective amounts of a first polymer comprised of a dialkyl diallyl ammonium halide containing (meth)acrylic acid moieties and a second anionic, nonionic or cationic acrylamide polymer is disclosed.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: September 7, 1999
    Assignee: Calgon Corporation
    Inventor: Denis E. Hassick
  • Patent number: 5785730
    Abstract: A fertilizer comprising a dewatered solid agricultural nutrient is disclosed. A method for preparing this fertilizer is provided including the steps of providing a raw agricultural waste to be treated, adding to the raw agricultural waste an effective amount of a composition comprising a quaternized amino methylated polyacrylamide polymer for separating the raw agricultural waste into a mixture having a separate clarified liquid portion and a separate dewatered nutrient solids portion, wherein the separated dewatered nutrient solids portion is a fertilizer, mixing the composition with the raw agricultural waste to facilitate the separation of the raw agricultural waste into the mixture, and subjecting the mixture to at least one mechanical separation means for segregating the separated clarified liquid portion from the fertilizer. An aqueous system comprising water, raw agricultural waste and a composition comprising a quaternized amino methylated polyacrylamide polymer is also disclosed.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: July 28, 1998
    Assignee: Calgon Corporation
    Inventors: Joseph P. Miknevich, Denis E. Hassick
  • Patent number: 5776350
    Abstract: A method for separating raw agricultural waste into a liquid portion and a nutrient enriched solids portion is disclosed. This method includes providing raw agricultural waste to be treated, adding to the raw agricultural waste an effective amount of a composition comprising a quaternized amino methylated polyacrylamide polymer for separating the raw agricultural waste into a mixture having a liquid portion and a nutrient solids portion, mixing the composition with the raw agricultural waste to facilitate the separation, and subjecting the mixture to at least one mechanical separation means for segregating the separated liquid portion from the separated nutrient solids portion. A method for transforming raw agricultural waste into a clarified liquid portion and a dewatered nutrient enriched solids portion is also provided.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: July 7, 1998
    Assignee: Calgon Corporation
    Inventors: Joseph P. Miknevich, Denis E. Hassick
  • Patent number: 5624570
    Abstract: A method for reducing turbidity in laundry waste water comprising the steps of treating said water with effective amounts of a first polymer comprised of dimethyl dialkyl ammonium chloride (DMDAAC) and dialkyl diallyl ammonium monomers (DADAAX) other than DMDAAC having alkyl groups with from 8 to 18 carbon atoms and counterions with an ionization constant greater than 10.sup.-8, and a second cationic, nonionic or anionic acrylamide polymer is disclosed.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: April 29, 1997
    Assignee: Calgon Corporation
    Inventor: Denis E. Hassick
  • Patent number: 5330656
    Abstract: A method for treating a waste system containing an oil phase dispersed on a water phase is disclosed that includes adding a polysalt having an anionic polymer component and a cationic polymer component wherein the weight ratio of the anionic polymer component to the cationic polymer component ranges from about 5:95 to 40:60, on an active basis.
    Type: Grant
    Filed: March 5, 1993
    Date of Patent: July 19, 1994
    Assignee: Calgon Corporation
    Inventor: Denis E. Hassick
  • Patent number: 5286390
    Abstract: A method for treating an ink-laden wastewater stream comprising adding an effective amount of a melamine-aldehyde polymer to the ink laden stream being treated and segregating at least some portion of the resulting ink-laden agglomerated solids from the treated water.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: February 15, 1994
    Assignee: Calgon Corporation
    Inventors: Ross T. Gray, Denis E. Hassick
  • Patent number: 5035808
    Abstract: The use as flocculants of ferric salt/water-soluble cationic polymer compositions having inorganic:polymer weight ratios of at least 5:1 is disclosed. These compositions are especially effective in low turbidity waters.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: July 30, 1991
    Assignee: Calgon Corporation
    Inventors: Denis E. Hassick, Joseph P. Miknevich
  • Patent number: 4800039
    Abstract: The use as flocculants of aluminum chlorohydrate/water-soluble cationic polymer compositions having inorganic:polymer weight ratios of at least 5:1 is disclosed. These compositions are especially effective in low turbidity waters.
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: January 24, 1989
    Assignee: Calgon Corporation
    Inventors: Denis E. Hassick, Joseph P. Miknevich
  • Patent number: 4746457
    Abstract: The use as flocculants of aluminum chloride/water-soluble cationic polymer compositions having inorganic:polymer weight ratios of at least 5:1 is disclosed. These compositions are especially effective in low turbidity waters.
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: May 24, 1988
    Assignee: Calgon Corporation
    Inventors: Denis E. Hassick, Joseph P. Miknevich