Patents Represented by Attorney Frank M. Van Riet
  • Patent number: 6608137
    Abstract: Stable, gel-free, water-in-oil microdispersions comprising a continuous phase of an oil and an emulsifier and a discontinuous phase of an aqueous solution of a hydroxamated vinyl polymer are disclosed. Also disclosed is a method for the production of the above-described microdispersions wherein neutralized hydroxylamide and excess base are reacted with a microdispersion of the vinyl polymer.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: August 19, 2003
    Assignee: Cytec Technology Corp.
    Inventors: Howard Ivan Heitner, Roderick Glyn Ryles
  • Patent number: 6262183
    Abstract: Hydroxamic acid polymers which are comprised of hydroxamic groups and carboxylic acid groups wherein the carboxylic acid groups constitute less than about 3% of the functional groups. The polymers hereof are also especially useful in biomedical applications because, for example, the low concentration of carboxylic acid groups decreases the incidence of bioincompatibility. Additionally, the polymers exhibit anticoagulant activity, urease inhibition activity, metal chelating activity and ion exchange activity.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: July 17, 2001
    Assignee: Cytec Technology Corp.
    Inventors: Abraham J. Domb, Robert S. Langer, Ernest G. Cravalho, Gershon Golomb, Edith Mathiowitz, Cato T. Laurencin
  • Patent number: 6147176
    Abstract: Water-soluble, branched, high molecular weight, cationic and non-ionic polymeric flocculants capable of manifesting their full performance potential without shearing are produced by polymerizing ethylenically unsaturated cationic and non-ionic monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: November 14, 2000
    Assignee: Cytec Technology Corp.
    Inventors: Roger Edgar Neff, Joseph Jacinto Pellon, Roderick Glyn Ryles
  • Patent number: 6130303
    Abstract: Water-soluble, high molecular weight, polymeric, microparticles with a high degree of branching are disclosed. A microemulsion polymerization process for preparing the microparticles is also disclosed. The microparticles give excellent results in a number of solid-liquid separation processes.
    Type: Grant
    Filed: January 11, 1994
    Date of Patent: October 10, 2000
    Assignee: Cytec Technology Corp.
    Inventors: Roger Edgar Neff, Roderick Glyn Ryles
  • Patent number: 6105424
    Abstract: A system and method for monitoring the dynamics of particle motion in a liquid-solid media including the rate of settling of particles, the identification of unsettled particle clouds, and the identification and control of the bed level of settled particles in a slurry within a settler is provided. The system includes an ultrasound transducer and a receiver for detecting echoes from particles in the slurry. The echoes are processed to determine the bed level of the settled particles, the position of unsettled particle clouds, and the rate of settling of the particle clouds.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: August 22, 2000
    Assignee: Cytec Technology Corp.
    Inventors: Charles Robert Fay, Ralph W. Barnes, Harold Leon Robinson
  • Patent number: 6080804
    Abstract: Processes for producing free flowing, Mannich and glyoxal polyacrylamide water soluble and water-swellable granules from a water-in-oil emulsion and compositions comprising such dry polymer granules are disclosed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 27, 2000
    Assignee: Cytec Technology Corp.
    Inventors: William Bloor Davies, Gary Kaui Lani Miller
  • Patent number: 6037406
    Abstract: Inverse microemulsions having a Standard Viscosity of at least about 3.3 cps are disclosed which comprise an aqueous phase of dispersed micelles containing water and an (alk)acrylamide-based polymer substituted with at least 1 mole percent of quaternized tertiary aminomethyl groups, wherein said microemulsion is derived from a microemulsion containing greater than about 20 percent, by weight, and less than about 40 percent, by weight, of aqueous phase polymer solids, based on said microemulsion. A method of making said microemulsions and use thereof to dewater dispersions of suspended solids are also taught.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: March 14, 2000
    Assignee: Cytec Technology Corp.
    Inventor: Michael Stephen Ryan
  • Patent number: 6025432
    Abstract: Inverse microemulsions are disclosed wherein the dispersed micelles containing water and an (alk)acrylamide-based polymer substituted with at least one mole percent of quaternized tertiary aminomethyl groups i.e. the aqueous phase, contain from about 20 percent to about 40 percent, by weight, of polymer solids and the microemulsion has a Standard Viscosity of at least about 3.3 cps. A method of making said microemulsions and use thereof to dewater dispersions of suspended solids are also taught.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: February 15, 2000
    Assignee: Cytec Technology Corp.
    Inventor: Michael Stephen Ryan
  • Patent number: 6020418
    Abstract: Stable, gel-free, water-in-oil microdispersions comprising a continuous phase of an oil and an emulsifier and a discontinuous phase of an aqueous solution of a hydroxamated vinyl polymer are disclosed. Also disclosed is a method for the production of the above-described microdispersions wherein neutralized hydroxylamide and excess base are reacted with a microdispersion of the vinyl polymer.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: February 1, 2000
    Assignee: Cytech Technology Corp.
    Inventors: Howard Ivan Heitner, Roderick Glyn Ryles
  • Patent number: 5961840
    Abstract: Unsheared, water-soluble, branched, high molecular weight, anionic, polymeric flocculants are produced by polymerizing ethylenically unsaturated anionic, and optionally non-ionic, monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: October 5, 1999
    Assignee: Cytec Technology Corp.
    Inventors: Roderick Glyn Ryles, Roger Edgar Neff, Joseph Jacinto Pellon
  • Patent number: 5959054
    Abstract: Novel depressants for depressing sulfide minerals during froth floatation of ores to recover value minerals are disclosed, as well as a method for their use in the froth flotation. The novel depressants are terpolymers of a (meth)acrylamide, an allyl thiourea and a hydroxyalkyl(meth)acrylate.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: September 28, 1999
    Assignee: Cytec Technology Corp.
    Inventors: Samuel S. Wang, Devarayasamudram R. Nagaraj
  • Patent number: 5945494
    Abstract: Water-soluble, branched, high molecular weight, cationic and non-ionic polymeric flocculants capable of manifesting their full performance potential without shearing are produced by polymerizing ethylenically unsaturated cationic and non-ionic monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: August 31, 1999
    Assignee: Cytec Technology Corp.
    Inventors: Roger Edgar Neff, Joseph Jacinto Pellon, Roderick Glyn Ryles
  • Patent number: 5939622
    Abstract: A system and method for monitoring the dynamics of particle motion in a liquid-solid media including the rate of settling of particles, the identification of unsettled particle clouds, and the identification and control of the bed level of settled particles in a slurry within a settler is provided. The system includes an ultrasound transducer and a receiver for detecting echoes from particles in the slurry. The echoes are processed to determine the bed level of the settled particles, the position of unsettled particle clouds, and the rate of settling of the particle clouds.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: August 17, 1999
    Assignee: Cytec Technology Corp.
    Inventors: Charles Robert Fay, Ralph W. Barnes, Harold Leon Robinson
  • Patent number: 5919882
    Abstract: Unsheared, water-soluble, branched, high molecular weight, anionic, polymeric flocculants are produced by polymerizing ethylenically unsaturated anionic, and optionally non-ionic, monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: July 6, 1999
    Assignee: Cytec Technology Corp.
    Inventors: Roderick Glyn Ryles, Roger Edgar Neff, Joseph Jacinto Pellon
  • Patent number: 5882525
    Abstract: Water-soluble, branched, high molecular weight, cationic and non-ionic polymeric flocculants capable of manifesting their full performance potential without shearing are produced by polymerizing ethylenically unsaturated cationic and non-ionic monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: March 16, 1999
    Assignee: Cytec Technology Corp.
    Inventors: Roger Edgar Neff, Joseph Jacinto Pellon, Roderick Glyn Ryles
  • Patent number: 5863982
    Abstract: Quaternized tertiary aminomethyl acrylamide polymer emulsions are treated by 1) adjusting the pH to about 3.6 to about 4.8, 2) adding a formaldehyde scavenger, 3) adjusting the water content of the aqueous phase to result in about 10-45 weight percent of quaternized aminomethylated acrylamide polymer and 4) heating the resultant emulsion at from about 40.degree. C. to about 80.degree. C. for about 3 to about 20 hours so as to render them more stable, capable of inversion in water independent of water temperature or pH of the medium flocculent and superior dewatering ability.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: January 26, 1999
    Assignee: Cytec Technology Corp.
    Inventors: Sun Yi Huang, Andrea Leone-Bay, Joseph Michael Schmitt, Paul S. Waterman
  • Patent number: 5847056
    Abstract: A process is disclosed for the formation of highly anionic hydroxamic acid polymers whereby (meth) acrylic acid polymers are esterified in aqueous solution to poly (meth) acrylates. The resultant polymers are then reacted with an hydroxylamine to produce hydroxamated (meth) acrylic acid containing polymers. The esterified polymers, their hydroxamated derivatives and their use to flocculate Bayer Process streams are also disclosed.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: December 8, 1998
    Assignee: Cytec Technology Corp.
    Inventors: Alan S. Rothenberg, Morris E. Lewellyn, C. Joseph Calbick
  • Patent number: 5789676
    Abstract: A system and method for monitoring the dynamics of particle motion in a liquid-solid media including the rate of settling of particles, the identification of unsettled particle clouds, and the identification and control of the bed level of settled particles in a slurry within a settler. The system includes an ultrasound transducer and a receiver for detecting echoes from particles in the slurry. The echoes are processed to determine the bed level of the settled particles, the position of unsettled particle clouds, and the rate of settling of the particle clouds, employing a neural network preferably with a Fuzzy Logic controller.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: August 4, 1998
    Assignee: Cytec Technology Corp.
    Inventors: Charles Robert Fay, Ralph W. Barnes, Harold Leon Robinson
  • Patent number: 5756622
    Abstract: Novel depressants for depressing sulfide minerals during froth floatation of ores to recover value minerals are disclosed, as well as a method for their use in the froth flotation. The novel depressants are terpolymers of a (meth)acrylamide, an allyl thiourea and a hydroxyalkyl (meth)acrylate.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: May 26, 1998
    Assignee: Cytec Technology Corp.
    Inventors: Samuel S. Wang, D. R. Nagaraj
  • Patent number: 5723548
    Abstract: Mannich (alk)acrylamide microparticles are produced at high solids contents without a significant increase in bulk viscosity by inverse microemulsion polymerization and provide superior dewatering characteristics.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: March 3, 1998
    Assignee: Cytec Technology Corp.
    Inventors: Joseph J. Kozakiewicz, Sun-Yi Huang