Patents by Inventor Peter J. Strydom

Peter J. Strydom 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).

  • Composition and process for increasing the shear strength of processing wastes used for tip building and underground consolidation
    Patent number: 5391597
    Abstract: There are provided compositions and processes for enhancing the initial and long term shear strength and initial tip stability of process wastes. The process wastes are aqueous dispersions such as the slurry tailings from mining operations. The compositions are comprised of the process waste, cement and a water absorbent polymer which is a mixture of Mannich acrylamide polymers and dimethyldiallyammonium halide polymers.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: February 21, 1995
    Assignee: Cytec Technology Corp.
    Inventors: Michael C. R. Davies, Keith P. Williams, Peter J. Strydom, Alexander S. Lambert
  • Removal of humate from bayer alumina liquors
    Patent number: 5133874
    Abstract: A process is disclosed for reducing the turbidity of a Bayer process liquor containing a cationic polymer-humate complex comprising adding to said liquor a higher molecular weight, cationic polymer.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: July 28, 1992
    Assignee: American Cyanamid Company
    Inventors: Donald P. Spitzer, Peter J. Strydom
  • Crosslinking water soluble polymers with iron to form gels for use in subterranean profile modification
    Patent number: 5065822
    Abstract: A process of profile modifying permeable soils with an environmentally safe composition of a non-toxic water-soluble polymer, a redox couple of a water-soluble ferrous salt and a non-toxic, oxidizing agent which are mixed in water and pumped into a subterranean formation wherein ferrous ion is oxidized to ferric ion to gel the polymer making the subterranean formation impermeable.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: November 19, 1991
    Assignee: American Cyanamid Company
    Inventors: Edward E. Miller, Peter J. Strydom
  • Novel process of alkoxy and aryloxy isothiocyanate preparation
    Patent number: 4778921
    Abstract: Alkoxy and aryloxy isothiocyanates are produced by the reaction of a haloformate and an alkali or alkaline earth metal thiocyanate in the presence of water and a catalyst comprising a six membered mononuclear or ten membered fused polynuclear aromatic, heterocyclic compound having 1 or 2 nitrogen atoms as the only hetero atoms in the ring.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: October 18, 1988
    Assignee: American Cyanamid Company
    Inventors: Morris E. Lewellyn, Samuel S. Wang, Peter J. Strydom
  • Process for the production of isothiocyanate derivatives
    Patent number: 4659853
    Abstract: Derivatives of alkoxy, aryloxy and alkene isothiocyanates are produced by the reaction of a haloformate, an alkali, alkaline earth metal, lead or ammonium thiocyanate and a compound having the formula R.sup.1 YH wherein R.sup.1 is alkyl, aryl or alkoxy, Y is oxygen, sulfur or NR.sup.2 and R.sup.2 is hydrogen or R.sup.1, in the presence of a solvent or water and a catalyst.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: April 21, 1987
    Assignee: American Cyanamid Company
    Inventors: Yun-Lung Fu, Peter J. Strydom