Patents Represented by Attorney Frank M. Van Riet

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  • Dewatering aid composition
    Patent number: 4206063
    Abstract: The mixture of a hydrophobic alcohol and a nonionic surfactant is an effective dewatering aid for mineral concentrates, significantly lowering the moisture content.
    Type: Grant
    Filed: December 5, 1978
    Date of Patent: June 3, 1980
    Assignee: American Cyanamid Company
    Inventors: Samuel S. Wang, Morris E. Lewellyn, Charles Dugan
  • Process for froth flotation of phosphate using combination collector
    Patent number: 4206045
    Abstract: Phosphate values are selectively froth floated from an aqueous ore pulp by use of a combination collector comprising a fatty acid and an N-alkyl substituted 3-sulfonic propionamide.
    Type: Grant
    Filed: December 7, 1978
    Date of Patent: June 3, 1980
    Assignee: American Cyanamid Company
    Inventors: Samuel S. Wang, Eugene L. Smith, Jr.
  • Mixtures of polycationic and polyanionic polymers for scale control
    Patent number: 4205143
    Abstract: Certain mixtures of polyanionic and polycationic polymers are effective inhibitors of magnesium hydroxide scale formation in evaporative desalination units.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: May 27, 1980
    Assignee: American Cyanamid Company
    Inventor: Richard M. Goodman
  • Process for melt-spinning acrylonitrile polymer fiber
    Patent number: 4205039
    Abstract: Spinning of a melt of water and an acrylonitrile polymer containing hydrophobic moieties through a spinnerette into a steam-pressurized solidification zone results in improved fiber when the amount of water in the melt is in the lower half of the range necessary to provide the melt under the conditions of extrusion, the amount of hydrophilic moieties contained in the polymer are sufficient to control the rate of release of water from the extrudate, the steam conditions in the solidification are sufficient to prevent formation of a separate water phase, and drying of the resulting extrudate under conditions of temperature and humidity to remove water therefrom while avoiding formation of a separate water phase.
    Type: Grant
    Filed: April 12, 1978
    Date of Patent: May 27, 1980
    Assignee: American Cyanamid Company
    Inventors: William E. Streetman, Shashikumar H. Daftary
  • Polyurethane compositions stabilized with ketoximes
    Patent number: 4203889
    Abstract: A polyurethane polymer stabilized against the deteriorative effects of ultraviolet light and nitrogen oxides is provided comprising the polymer combined with a stabilizing amount of an oxime of an aliphatic or cycloaliphatic ketone.
    Type: Grant
    Filed: December 18, 1974
    Date of Patent: May 20, 1980
    Assignee: American Cyanamid Company
    Inventors: Eugene Y. C. Chang, Samuel Kaizerman
  • Sulfur vulcanizable ethylene-vinyl acetate copolymer elastomers
    Patent number: 4202845
    Abstract: Copolymers of ethylene and vinyl acetate having grafted thereon a mixture of a major proportion of one or more acrylic acid esters and a minor proportion of an ethylenically unsaturated comonomer containing a cure-site for sulfur vulcanization, and the vulcanized elastomers obtained therefrom, are disclosed.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: May 13, 1980
    Assignee: American Cyanamid Company
    Inventors: Eugene Y. C. Chang, Robert Saxon
  • Vulcanization system for thiodiethanol-based elastomers
    Patent number: 4202963
    Abstract: The present invention relates in general to sulfur-vulcanizable elastomers derived from thiodiethanol and, in particular to the provision of a novel vulcanization system therefor comprising sulfur and an aliphatic linear, branched chain of cyclic polyethyleneamine or a dissociable organic salt thereof.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: May 13, 1980
    Assignee: American Cyanamid Company
    Inventor: Rudolf A. Behrens
  • Process for recovery of fine coal
    Patent number: 4199065
    Abstract: Fine coal is recovered with reduced ash content when a bis(alkyl)ester of a sulfosuccinic acid salt is employed as conditioning agent in froth flotation thereof.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: April 22, 1980
    Assignee: American Cyanamid Company
    Inventors: Samuel S. Wang, Morris E. Lewellyn, Eugene L. Smith, Jr.
  • Process for beneficiating non-sulfide minerals
    Patent number: 4199064
    Abstract: The use of a collector combination of a fatty acid and a N-sulfodicarboxylic acid aspartate provides boostering action in the recovery of non-sulfide minerals.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: April 22, 1980
    Assignee: American Cyanamid Company
    Inventor: Rudolph N. Holme
  • Polyurethane latices modified by a vinyl polymer
    Patent number: 4198330
    Abstract: A composition of matter is provided comprising a polyurethane latex and a polymer of at least one vinyl monomer, said polymer having been obtained by free radical polymerization of said monomer in the presence of the latex and being characterized as a hard, resinous material at temperatures below about 60.degree. C.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: April 15, 1980
    Assignee: American Cyanamid Company
    Inventors: Samuel Kaizerman, Romeo R. Aloia
  • Conditioning agent for froth flotation of fine coal
    Patent number: 4196092
    Abstract: A conditioning agent comprising a frother and a bis(alkyl)ester of a sulfosuccinic acid salt provides high coal recovery with reduced ash content.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: April 1, 1980
    Assignee: American Cyanamid Company
    Inventors: Samuel S. Wang, Morris E. Lewellyn, Eugene L. Smith, Jr.
  • Flame-retardant particleboard
    Patent number: 4163820
    Abstract: Flame-proofed particleboard wherein the layers of wood particles have crystalline, water-insoluble, ammonium polyphosphate added thereto, is disclosed.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: August 7, 1979
    Assignee: American Cyanamid Company
    Inventors: Hans A. Corver, Allan J. Robertson
  • Benzothiazole accelerators stabilized with oxirane compounds
    Patent number: 4160741
    Abstract: Oxirane compounds having a molecular weight greater than 60 have been found to be effective stabilizers for benzothiazole rubber accelerators.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: July 10, 1979
    Assignee: American Cyanamid Company
    Inventor: Curtis A. Franz
  • Polyurethanes stabilized against ultraviolet light and nitrogen oxide deterioration
    Patent number: 4157359
    Abstract: A polyurethane polymer stabilized against the deteriorative effects of ultraviolet light and nitrogen oxides is provided comprising the polymer combined with a stabilizing amount of an aminoplast resin.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: June 5, 1979
    Assignee: American Cyanamid Co.
    Inventors: Eugene Y. C. Chang, Samuel Kaizerman
  • Rapid curing melamine-formaldehyde resin composition
    Patent number: 4141872
    Abstract: A resin composition comprisingA. the resinous reaction product of melamine, formaldehyde and diethylethanolamine,B. an ortho- or para-toluene sulfonamide,C. ethyleneglycol phenyl ether or diglycol amine andD. waterAnd a method for the production thereof, are disclosed.
    Type: Grant
    Filed: November 30, 1977
    Date of Patent: February 27, 1979
    Assignee: Formica Corporation
    Inventor: Kenneth D. Bunkowski
  • Decorative article having a bondable surface and method of manufacture
    Patent number: 4140837
    Abstract: A decorative article of manufacture having at least one face which can be glued to other surfaces by using common adhesives and may be painted with a variety of paints and stains is disclosed.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: February 20, 1979
    Assignee: Formica Corporation
    Inventors: Terry P. Drees, Michael C. Gallagher
  • Method and apparatus for controlling rate related manufacturing operations using a reaction simulation technique
    Patent number: 4140050
    Abstract: A method and apparatus are disclosed whereby a laminating press is controlled using the relative cure of a resinous material as the primary factor.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: February 20, 1979
    Assignee: Formica Corporation
    Inventor: Sydney A. Giddings
  • Treatment of acrylamide polymer gel
    Patent number: 4132844
    Abstract: A method for reducing the amount of water-insolubles and free monomer in an aqueous acrylamide polymer gel whereby the gel is heated at from about 80.degree. C to about 150.degree. C for at least about 30 minutes while the water content of the gel is maintained substantially constant.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: January 2, 1979
    Assignee: American Cyanamid Company
    Inventor: Michael W. C. Coville
  • Polyurethanes stabilized against ultraviolet light and nitrogen oxide deterioration
    Patent number: 4130542
    Abstract: A polyurethane polymer stabilized against the deteriorative effects of ultraviolet light and nitrogen oxides which comprises a polyurethane polymer and a stabilizing amount of an aliphatic or cycloaliphatic monoisocyanate or diisocyanate, said polyurethane polymer comprising an isocyanate terminated prepolymer obtained by reacting a polyether or a polyester with an excess of an aromatic diisocyanate, forming an emulsion thereof and subsequently chain-extending the prepolymer with water.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: December 19, 1978
    Assignee: American Cyanamid Company
    Inventors: Eugene Y. C. Chang, Samuel Kaizerman
  • Armchair
    Patent number: D254700
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: April 15, 1980
    Assignee: Formica Corporation
    Inventor: William J. Hershberger