Patents Represented by Attorney W. C. Mitchell
  • Patent number: 4830657
    Abstract: Synergistic antimicrobial combination comprising 2-bromo-2-bromomethylglutaronitrile of Formula I: ##STR1## and a 1,2-benzisothiazolin-3-one of Formula II: ##STR2## where R is hydrogen or C.sub.1-4 alkyl; and R.sup.1 is hydrogen, chloro, or methyl.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: May 16, 1989
    Assignee: Calgon Corporation
    Inventors: John A. Jakubowski, Joseph Gyuris
  • Patent number: 4816508
    Abstract: The present invention is directed to an admixture, comprising:(A) a cationic acrylate or methacrylate polymer and(B) 0.1 to 5.0%, by weight, based on the weight of said polymer, of an acidic buffering compound.The present invention is also directed to a method for improving the stability of cationic acrylate polymers, comprising adding 0.1 to 5.0%, by weight, based on the weight of the polymer, of an acidic buffering compound.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: March 28, 1989
    Assignee: Calgon Corporation
    Inventor: Shih-Ruey T. Chen
  • Patent number: 4808215
    Abstract: The instant invention is directed to compositions and a method of improving the flowability of agro-chemical slurries and suspensions, comprising adding to the suspension or slurry being treated an effective amount of: (a) a water soluble polymer; and, optionally, (b) a surfactant, wherein the polyelectrolyte/surfactant weight ratio ranges from 10:1 to 1:10.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: February 28, 1989
    Assignee: Calgon Corporation
    Inventors: Jasbir S. Gill, Richard G. Varsanik
  • Patent number: 4804476
    Abstract: This invention is directed to the use of an improved composition for inhibiting the precipitation of calcium oxalate in aqueous systems. The composition contains: (a) a water soluble phosphate; and (b) a water soluble polycarboxylate having a weight average molecular weight of about 7,000 to about 9,000; wherein the ratio of component (a) to component (b) ranges from 10:1 to 1:10.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: February 14, 1989
    Assignee: Calgon Corporation
    Inventors: Gloria D. Sinkovitz, Kevin J. Hipolit
  • Patent number: 4799969
    Abstract: This invention is directed to non-aqueous magnesium oxide slurries and the use thereof to coat silicon steels prior to high temperature annealing.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: January 24, 1989
    Assignee: Calgon Corporation
    Inventor: Michael W. Howe
  • 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: 4798683
    Abstract: A method for inhibiting corrosion in aqueous systems comprising adding to the system being treated an effective amount of a composition comprising a molybdate ion source and a water-soluble component selected from polymaleic acid anhydride, amine adducts of polymaleic anhydride, maleic anhydride copolymers, carboxylic acid/sulfonic acid polymers, salts of the above-described polymers, phosphonates, phosphino carboxylic acids, polyphosphoric acid and esters of polyphosphoric acid.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: January 17, 1989
    Assignee: Calgon Corporation
    Inventors: Bennett P. Boffardi, Susan P. Rey
  • Patent number: 4786364
    Abstract: The instant invention is directed to a method for deinking cellulosic fibrous material impregnated with ink wherein a mixture of said material and water is stirred in the presence of a deinking agent, the improvement wherein the deinking agent is a hydrolyzed copolymer of dimethyldiallyl ammonium chloride and acrylamide.
    Type: Grant
    Filed: August 2, 1984
    Date of Patent: November 22, 1988
    Assignee: Calgon Corporation
    Inventor: Edwin R. Tefft
  • Patent number: 4783267
    Abstract: A method for stabilizing metal ions in recirculating water systems is disclosed. This method utilizes 2-hydroxyphosphonoacetic acid at a dosage of 0.1-100 ppm to solubilize metal ions thereby reducing deposition and corrosion.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: November 8, 1988
    Assignee: Calgon Corporation
    Inventors: Bennett P. Boffardi, Susan P. Rey
  • Patent number: 4778085
    Abstract: A peristaltic apparatus for dispensing a fluid, which contains a mounting plate, a container support/anvil connected to the mounting plate, a rigid container for holding the fluid to be dispensed, a flexible dispensing tube which is connected to the bottom of the container and which contains a check valve, a housing which encloses the container support and dispensing tube and an actuator which integrally contains a flexible spring bar which exerts a peristaltic force on the flexible tube, thereby forcing fluid from the dispenser.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: October 18, 1988
    Assignee: Calgon Corporation
    Inventors: Lee W. Bush, George A. Rauh
  • Patent number: 4772659
    Abstract: The instant invention is directed to a surfactant system for use in manufacturing water-in-oil emulsions of water-soluble polymers made from ethylenically unsaturated monomers comprising 25 to 85 percent, by weight, an oil-soluble alkanolamide, 5 to 35 percent, by weight, a polyoxyethylene derivative of a sorbitan ester, and 0 to 50 percent, by weight sorbitan monooleate.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: September 20, 1988
    Assignee: Calgon Corporation
    Inventor: Marie S. Chan
  • Patent number: 4772462
    Abstract: This invention relates to improved hair products which contain dialkyl diallyl ammonium chloride/acrylic acid-type polymers. These polymers provide exceptional conditioning properties to hair products such as shampoos, conditioners, rinses, bleaches, hair dyes and hair sprays.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: September 20, 1988
    Assignee: Calgon Corporation
    Inventors: Jerry E. Boothe, Lewis D. Morse, William L. Klein
  • Patent number: 4764365
    Abstract: This invention relates to improved personal skin care products which contain dimethyl diallyl ammonium chloride/acrylic acid-type polymers. These polymers provide exceptional feel to skin when personal skin care products containing them, such as hand and face lotions, soaps or creams, suntan lotions, bubble baths, shaving creams, antiperspirants, and deodorants, are used.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: August 16, 1988
    Assignee: Calgon Corporation
    Inventors: Jerry E. Boothe, Lewis D. Morse, William L. Klein
  • Patent number: 4759855
    Abstract: An improved method for detackifying over-sprayed paint, lacquer or enamel entrained in the circulating water of paint spray booths comprises maintaining in the wash water a small amount of an alkaline zinc solution containing ammonium hydroxide and ammonium chloride.
    Type: Grant
    Filed: July 24, 1987
    Date of Patent: July 26, 1988
    Assignee: Calgon Corporation
    Inventor: Herbert J. Kaiser
  • Patent number: 4753687
    Abstract: This invention is directed to non-aqueous magnesium oxide slurries and the use thereof to coat silicon steels prior to high temperature annealing.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: June 28, 1988
    Assignee: Calgon Corporation
    Inventor: Michael W. Howe
  • 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
  • Patent number: 4740251
    Abstract: This invention is directed to improved magnesium oxide slurries for use in coating silicon steels prior to high temperature annealing, comprising a calcination-modified magnesium oxide and water. Inorganic salts of barium, chromium, silicon, zinc or aluminum are added to magnesium hydroxide prior to calcination, resulting in a calcined magnesium oxide product having improved properties.This invention is also directed to an improved process for coating silicon steel, using the above described improved magnesium oxide product.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: April 26, 1988
    Assignee: Calgon Corporation
    Inventor: Michael W. Howe
  • Patent number: 4735628
    Abstract: The instant invention is directed to a dyed cellulosic material which has been treated with 0.1 to 5%, by weight, based on the weight of said material, of a polymer containing:(A) 50% to 90%, by weight, based on the total weight of the polymer, of selected cationic mer units;(B) 10% to 50%, by weight, based on the total weight of the polymer, of selected reactive mer units; and(C) 0 to 25%, by weight, based on the total weight of the polymer of selected inert mer units.The instant invention is also directed to a process for producing improved wet fast dyed cellulosic material.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: April 5, 1988
    Assignee: Calgon Corporation
    Inventors: Francis A. Daniher, J. Richard Aspland
  • Patent number: 4726906
    Abstract: The instant invention is directed to a polymer, having an intrinsic viscosity of 1.0 to 7.0, preferably 1.5 to 5.0, dl/g in 1.0 M NaCl, prepared from:(A) 2.5 to 45%, by weight, of at least one unsaturated carboxylic acid, or its salt;(B) 5.0 to 85%, by weight, of at least one unsaturated sulfonic acid, or its salt;(C) 2.5 to 15%, by weight, of at least one unsaturated cationic-containing monomer; and(D) 0 to 90%, by weight, of at least one unsaturated non-ionic monomer.The instant invention is also directed to the polymer in combination with an aqueous clay dispersion and the use of the admixture as a filtration aid in drilling muds.
    Type: Grant
    Filed: December 4, 1986
    Date of Patent: February 23, 1988
    Assignee: Calgon Corporation
    Inventors: Shih-Ruey T. Chen, Christine A. Costello, Gary F. Matz
  • Patent number: 4717543
    Abstract: The present invention is directed to a method of inhibiting the corrosion of copper and copper alloys in an aqueous system containing oxygen using an effective amount of a polymer prepared from:(A) about 30 to about 70%, by weight, of acrylic acid or methacrylic acid;(B) about 30 to about 70%, by weight, of 2-acrylamido-2-methylpropylsulfonic acid or 2-methacrylamido-2-methylpropylsulfonic acid; and(C) about 15 to about 25%, by weight, of 2-acrylamido-2-methylpropylphosphonic acid or 2-methacrylamido-2-methylpropylphosphonic acid, acrylamide or methacrylamide; wherein the polymer has an intrinsic viscosity of from about 0.05 to about 4.5 dl/g, in 1.0 M NaCl.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: January 5, 1988
    Assignee: Calgon Corporation
    Inventors: Nancy S. Sherwood, Nicholas J. Alfano