Patents Assigned to Hercules
  • Proteins for use as pitch and stickies control agents in pulp and papermaking processes
    Patent number: 6527915
    Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. Whey proteins are added to the pulp or applied to deposition prone surfaces of a papermaking system.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: March 4, 2003
    Assignee: Hercules Incorporated
    Inventor: Qu-Ming Gu
  • Esterified polysaccharide products and B-lactone ring opened ketene dimer products containing the compositions, and process of making the same
    Patent number: 6528643
    Abstract: Product of esterified polysaccharides and the process of making such product. The process can be enzymatic where an enzyme is used as a catalyst for the reaction. The process can also be chemical where no enzyme is used. Novel products are obtained through lipase-catalyzed &bgr;-lactone ring opening alcoholysis of ketene dimers and the process of making such compositions containing products.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: March 4, 2003
    Assignee: Hercules Incorporated
    Inventors: Huai N. Cheng, Qu Ming Gu
  • Process for controlling deposit of sticky material
    Patent number: 6517682
    Abstract: Method of inhibiting the deposit of sticky material on a papermill felt used in processing pulp slurry into sheets, comprising applying to the papermill felt at least one cationic polymer and at least one nonionic surfactant having an HLB of about 11 to 14.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: February 11, 2003
    Assignee: Hercules Incorporated
    Inventors: William A. Hendriks, Jeffrey R. Cowart
  • Asphalt emulsion containing solidified pyrolytic wood tar oil
    Patent number: 6512090
    Abstract: Asphalt emulsions containing emulsifiers comprising alkali metal or ammonium salts of solidified pyrolytic wood tar oil. Resinous compositions useful as asphalt emulsifiers comprising: (a) solidified pyrolytic wood tar oil and salts thereof, and (b) rosins and salts thereof.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: January 28, 2003
    Assignee: Hercules Incorporated
    Inventors: Richard Robert Suchanec, Norman Leroy Kennedy
  • Low silica furnace cement
    Patent number: 6506247
    Abstract: A refractory furnace cement is provided, that can be formulated to be air setting and substantially free of silica. The composition can be formed with a refractory agent, a rheology modifier, a corrosion inhibitor, a binder, such as a sodium silicate type binder, a flocculating agent and various inorganic fillers, to promote thermal stability, shelf stability, appropriate setting times and cold mortar strength.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: January 14, 2003
    Assignee: Hercules Chemical Company Incorporated
    Inventor: Fred Richard Scholer
  • Variant galactose oxidase, nucleic acid encoding same, and methods of using same
    Patent number: 6498026
    Abstract: The present invention provides mutant genes encoding variant galactose oxidase enzymes, termed vGOs; constructs and recombinant host cells incorporating the genes; the vGO polypeptides encoded by the genes; antibodies to the polypeptides; and methods of making and using all of the foregoing.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: December 24, 2002
    Assignee: Hercules Incorporated
    Inventors: Simon Delagrave, Anthony M. Maffia, III, Dennis J. Murphy, Jennifer L. Rittenhouse Pruss, Edward J. Bylina, William J. Coleman
  • Acid demulsifier hydrocarbon process deposit removal treatment and compositions
    Publication number: 20020177538
    Abstract: Compositions for removing deposits from the interior surfaces of oil refining equipment are provided. The compositions include an organic oil-soluble or oil-miscible acid and a multi-polyether-headed surfactant (MPEHS). Methods of removing these deposits from the interior surfaces of oil refining equipment and removing mud deposits from the bottom of desalters, while the equipment is online, are also disclosed.
    Type: Application
    Filed: March 15, 2001
    Publication date: November 28, 2002
    Applicant: Hercules Incorporated
    Inventors: Paul R. Hart, Michelle Moffitt
  • Solid phase enzymatic assembly of polynucleotides
    Patent number: 6479262
    Abstract: The present invention provides methods of preparing large polynucleotides of arbitrary sequence and in a manner that will readily lend itself to automation. The present invention provides methods of preparing a polynucleotide having at least 200 nucleotides in either a 5′ to 3′ or 3′ to 5′ direction by ligating a plurality of oligonucleotides, the assembly of which, represents the nucleotide sequence of the desired polynucleotide.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: November 12, 2002
    Assignee: Hercules, Incorporated
    Inventor: Simon Delagrave
  • Process for thickening an aqueous system
    Patent number: 6479573
    Abstract: Process for thickening aqueous systems by addition of aqueous suspensions of water-soluble hydrophobically modified polyurethanes, polyacrylates and poly(acetal- or ketal-polyethers) and carbon containing salts.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: November 12, 2002
    Assignee: Hercules Incorporated
    Inventors: Charles Lee Burdick, Arjun Chandra Sau
  • Polymeric fluid loss additives and method of use thereof
    Patent number: 6465587
    Abstract: The present invention relates to compositions and use of water-soluble or water-dispersible copolymers for oil field applications. Specifically, the present invention relates to polymers containing allyloxy linkage and its functional dervatives for use in oil field applications as fluid additives for drilling and cementing processes.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: October 15, 2002
    Assignee: Hercules Incorporated
    Inventors: Keith A. Bair, Fu Chen, Mohand Melbouci, Teng-Shau Young, De-Kai Loo
  • Proteins and polymers for use as pitch and stickies control agents in pulp and papermaking processes
    Patent number: 6461477
    Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. A combination of a protein and a cationic polymer is added to the pulp or applied to deposition prone surfaces of a papermaking system.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: October 8, 2002
    Assignee: Hercules Incorporated
    Inventors: Duy T. Nguyen, Qu-Ming Gu
  • Fluidized polymer suspension of hydrophobically modified poly(acetal- or ketal-polyether) polyurethane and polyacrylate
    Patent number: 6433056
    Abstract: Aqueous suspensions of water-soluble hydrophobically modified polyurethanes, polyacrylates and poly(acetal- or ketal-polyethers) and carbon containing salts, process of making the suspensions and process of using them as thickeners for aqueous systems.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: August 13, 2002
    Assignee: Hercules Incorporated
    Inventors: Charles Lee Burdick, Arjun Chandra Sau
  • Galactosylated hydroxyalkyl polysaccharides
    Patent number: 6433161
    Abstract: Galactosylated hydroxyalkyl polysaccharides wherein galactose moieties are bound to the hydroxyalkyl polysaccharide by galactosidic bonds, and a process for preparing the galactosylated hydroxyalkyl polysaccharides having the steps: a) providing at least one hydroxyalkyl polysaccharide; and b) treating said hydroxyalkyl polysaccharide with a galactose donor in the presence of galactosidase enzyme for a time sufficient to convert at least a portion of said hydroxyl groups to galactosides.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: August 13, 2002
    Assignee: Hercules Incorporated
    Inventors: H. N. Cheng, Robert G. Nickol, George Wang, Jun Li
  • Fungicidal method
    Patent number: 6428654
    Abstract: Use of strobilurins and oudemansins as biocides in aqueous systems is disclosed. Uses include wet-lap preservation, mold proofing, mildew proofing, and other uses where anti-fungal and/or anti-mildew activity is desired. Aqueous systems treatable with strobilurins and/or oudemansins include pulp and paper systems, oil and gas systems, cooling towers, and heat exchangers.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: August 6, 2002
    Assignee: Hercules Incorporated
    Inventors: John M. Cronan, Jr., Howard A. Cash
  • Process to reduce the AOX level of wet strength resins by treatment with base
    Patent number: 6429267
    Abstract: Process for reducing the AOX content of wet-strength resins, such as polyaminopolyamide-epi or polyalkylene polyamine-epi resins, by treatment with base, e.g. sodium hydroxide, while maintaining the wet-strength effectiveness of the resin.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: August 6, 2002
    Assignee: Hercules Incorporated
    Inventor: Richard James Riehle
  • Method for making hydrophobically associative polymers, methods of use and compositions
    Patent number: 6417268
    Abstract: Method for producing an hydrophobically associative polymer is provided which is characterized by forming a monomer solution comprising a surfactant, at least one hydrophobic ethylenically unsaturated monomer, at least one hydrophilic monomer selected from nonionic ethylenically monomers, cationic ethylenically unsaturated monomers, anionic ethylenically unsaturated monomers or mixtures thereof, and water; forming a salt solution comprising a multivalent salt and water; mixing the monomer solution and salt solution to form a mixed solution; and charging the mixed solution with an initiator, thereby polymerizing the monomers to form the hydrophobically associative polymer in a dispersion. Aqueous dispersion containing the hydrophobically associative polymer formed by the method.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: July 9, 2002
    Assignee: Hercules Incorporated
    Inventors: Huashi T. Zhang, Baraka A. Kawawa, Fu Chen
  • Method for preparing aqueous size composition
    Patent number: 6414055
    Abstract: There is disclosed a process for preparing an aqueous size composition by emulsifying a cellulose reactive size not solid at 25° C. into a starch stabilized aqueous polymer dispersion. The emulsification is carried out at a temperature substantially lower than 70° C.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: July 2, 2002
    Assignee: Hercules Incorporated
    Inventor: Rodrigue V. Lauzon
  • Biosensor and deposit sensor for monitoring biofilm and other deposits
    Patent number: 6405582
    Abstract: A method and apparatus for determining the deposition of organic and inorganic contaminants, such as biofilm, on a coupon is disclosed. The method and apparatus include a coupon suspended from a weight sensor within a reservoir tank. The reservoir tank includes fluid inlet means for receiving a fluid sample which flows over the surface of the coupon for a predetermined period of time to allow contaminants present in the fluid sample to deposit on the coupon surface. At regular intervals, the reservoir tank is drained and the coupon is allowed to dry and is weighed. The weight of the contaminants which have deposited on the surface of the coupon is determined by comparing the weight of the coupon to its previous weight. In this manner, a computer system attached to the weight sensor can analyze a series of weights and present the results in a time-deposit graph.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: June 18, 2002
    Assignee: Hercules Incorporated
    Inventor: Helmut Boettcher
  • Environmentally acceptable well cement fluid loss control additives, compositions and methods
    Patent number: 6405801
    Abstract: Environmentally acceptable well cement fluid loss control additives, cement compositions including the additives and methods of using the compositions are provided. The environmentally acceptable fluid loss control additives are comprised of ethoxylated hydroxyethylcellulose having a reduced molecular weight.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: June 18, 2002
    Assignees: Halliburton Energy Services, Inc., Hercules Incorporated
    Inventors: Jan Pieter Vijn, Bach Dao, Mohand Melbouci
  • Method for reducing cyanide consumption during processing of gold and silver ores to remove base metals
    Patent number: 6406675
    Abstract: A method for reducing consumption of cyanide and level of carbon fouling during cyanide extraction of gold and silver from their ores by treating the ore or aqueous slurry of the ore with a water-soluble sequestering agent for the base metal species for a time sufficient for the sequestering agent to react with at least a portion of the base metal species.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: June 18, 2002
    Assignee: Hercules Incorporated
    Inventor: Terrence P. Small