Patents by Inventor Wilbur S. Mardis

Wilbur S. Mardis 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).

  • Publication number: 20070197711
    Abstract: A polymer/organoclay composition having improved color stability. The composition includes a halogenated polymer matrix. It also includes an organoclay composition which is comprised of phyllosilicate clay and one or more quaternary ammonium compounds. The quaternary ammonium compounds include tri- and tetra-[poly]oxyalkylene quaternary ammonium compounds, the ether and ester derivatives thereof. The phyllosilicate clay phyllosilicate clay includes a smectite clay and the polymer includes polyvinyl chloride. The polymer/organoclay composition includes quaternary ammonium compounds selected from the following: tris[2-hydroxyethyl]tallow alkyl ammonium ion, tris[2-hydroxyethyl]hydrogenated tallow alkyl ammonium ion and tris[2-hydroxyethyl]stearyl alkyl ammonium ion.
    Type: Application
    Filed: February 16, 2007
    Publication date: August 23, 2007
    Inventors: Wouter L. Ijdo, Wilbur S. Mardis, Daphne Benderly
  • Patent number: 7258733
    Abstract: A clay slurry is described using smectite clay, water, and a defined phosphonate additive that is hydrolytically stable over time. The viscosity of the clay slurry remains pourable and relatively unchanged over time compared to prior art slurries. The slurry is useful to provide rheological control to paints and coatings and is particularly useful as an anti-bleed additive for concrete.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: August 21, 2007
    Assignee: Elementis Specialties, Inc.
    Inventors: Wouter Ijdo, Wilbur S. Mardis, Fred Whitton
  • Publication number: 20040016369
    Abstract: A clay slurry is described using smectite clay, water, and a defined phosphonate additive that is hydrolytically stable over time. The viscosity of the clay slurry remains pourable and relatively unchanged over time compared to prior art slurries. The slurry is useful to provide rheological control to paints and coatings and is particularly useful as an anti-bleed additive for concrete.
    Type: Application
    Filed: July 17, 2003
    Publication date: January 29, 2004
    Inventors: Wouter Ijdo, Wilbur S. Mardis, Fred Whitton
  • Publication number: 20030047117
    Abstract: A clay slurry is described using smectite clay, water, and a defined phosphonate additive that is hydrolytically stable over time. The viscosity of the clay slurry remains pourable and relatively unchanged over time compared to prior art slurries. The slurry is useful to provide Theological control to paints and coatings and is particularly useful as an anti-bleed additive for concrete.
    Type: Application
    Filed: August 20, 2002
    Publication date: March 13, 2003
    Applicant: Elementis Specialties, Inc.
    Inventors: Wouter Ijdo, Wilbur S. Mardis, Fred Whitton
  • Publication number: 20020144630
    Abstract: A clay slurry is described using smectite clay, water, and a defined phosphonate additive that is hydrolytically stable over time. The viscosity of the clay slurry remains pourable and relatively unchanged over time compared to prior art slurries. The slurry is useful to provide rheological control to paints and coatings and is particularly useful as an anti-bleed additive for concrete.
    Type: Application
    Filed: January 8, 2001
    Publication date: October 10, 2002
    Applicant: Elementis Specialties, Inc.
    Inventors: Wouter Ijdo, Wilbur S. Mardis, Fred Whitton
  • Patent number: 6448366
    Abstract: An improved thickening composition for organic systems, including paints and coatings, is described. The additive provides paints and coatings more than adequate viscosity improvement without affecting intercoat adhesion characteristics.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: September 10, 2002
    Assignee: Elementis Specialties, Inc.
    Inventors: Mahalingam Santhanam, Wilbur S. Mardis
  • Patent number: 5023309
    Abstract: A water dispersible, modified polyurethane which is the reaction product of polyisocyanate, polyether polyol, modifying agent containing at least one pendant hydrophobic group and at least two active hydrogen moieties and capping agent. The modified polyurethane may also include a second type of modifying agent which does not have a pendant hydrophobic group. The modified polyurethane can be prepared by reacting the polyisocyanate and the polyether polyol and then adding the capping agent and finally the modifying agent with or without the second modifying agent. The modified polyurethane resists microbial attack, exhibits superior efficiency in thickening aqueous compositions under high shear conditions and achieves acceptable sag and leveling.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: June 11, 1991
    Assignee: Rheox, Inc.
    Inventors: Uno Kruse, Burlon C. Crowley, Wilbur S. Mardis
  • Patent number: 4517112
    Abstract: An organophilic clay gellant useful for gelling organic liquids is disclosed which comprises the reaction product of (a) a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of said clay; (b) a primary anion selected from the group consisting of anions derived from organic sulfonic acids, alkylsulfates and mixtures thereof containing at least one lineal or branched alkyl group having greater than 9 carbon atoms, aromatic sulfonic acids and mixtures thereof; (c) a secondary anion different from said primary anion and selected from the group consisting of anions derived from organic acids having a pKa of less than about 11.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: May 14, 1985
    Assignee: NL Industries, Inc.
    Inventors: Wilbur S. Mardis, Claude M. Finlayson
  • Patent number: 4434075
    Abstract: An organophilic clay gellant is disclosed which comprises the reaction product of an organic cation compound, an organic anion, and a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of said clay. The organic cation compound has the formula: ##STR1## wherein R.sub.1 is selected from the group consisting of a .beta., .gamma.-unsaturated alkyl group and a hydroxyalkyl group having 2 to 6 carbon atoms and mixtures thereof; R.sub.2 is a long chain alkyl group having 12 to 60 carbon atoms; R.sub.3 and R.sub.4 are individually selected from the group consisting of a .beta., .gamma.-unsaturated alkyl group, a hydroxyalkyl group having 2 to 6 carbon atoms, an aralkyl group, an alkyl group having from 1 to 22 carbon atoms and mixtures thereof; X is selected from a group consisting of phosphorous and nitrogen.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: February 28, 1984
    Assignee: NL Industries, Inc.
    Inventors: Wilbur S. Mardis, Claude M. Finlayson
  • Patent number: 4434076
    Abstract: An organophilic clay gellant comprising the reaction product of an organic cationic compound and a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of said clay, wheein said organic cationic compound contains (a) a first member selected from the group consisting of a .beta., .gamma.-unsaturated alkyl group, and a hydroxyalkyl group having 2 to 6 carbon atoms, and mixtures thereof, (b) a second member comprising a long chain alkyl group having 12 to 60 carbon atoms and (c) a third and fourth alkyl member.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: February 28, 1984
    Assignee: NL Industries, Inc.
    Inventors: Wilbur S. Mardis, Claude M. Finlayson
  • Patent number: 4412018
    Abstract: An organophilic clay gellant and methods of using and making the same which comprises the reaction product of an organic cation, an organic anion and a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of said clay such that an organic cation-organic anion complex is intercalated with the smectite-type clay and the cation exchange sites of the smectite-type clay are substituted with the organic cation.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: October 25, 1983
    Assignee: NL Industries, Inc.
    Inventors: Claude M. Finlayson, Wilbur S. Mardis
  • Patent number: 4410364
    Abstract: Printing inks are provided comprising an organic ink vehicle having dispersed therein an ink coloring material and an organophilic clay gellant. The organophilic clay gellant comprises the reaction product of an organic cation, an organic anion and a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of said clay such that an organic cation - organic anion complex is intercalated with the smectite-type clay and the cation exchange sites of the smectite-type clay are substituted with the organic cation.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: October 18, 1983
    Assignee: NL Industries, Inc.
    Inventors: Claude M. Finlayson, Wilbur S. Mardis
  • Patent number: 4391637
    Abstract: A self-activating organophilic clay gellant having enhanced dispersibility in non-aqueous fluid systems comprising the reaction product of a smectite-type clay and an organic cationic compound having at least one long chain alkyl group and at least one long chain alkyl group and at least one group selected from a .beta., .gamma.-unsaturated alkyl group or a hydroxyalkyl group having 2 to 6 carbon atoms.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: July 5, 1983
    Assignee: NL Industries, Inc.
    Inventors: Wilbur S. Mardis, Claude M. Finlayson
  • Patent number: RE41588
    Abstract: An improved thickening composition for organic systems, including paints and coatings, is described. The additive provides paints and coatings more than adequate viscosity improvement without affecting intercoat adhesion characteristics. REEXAMINATION RESULTS The questions raised in reexamination request no. 90/007130, filed Jul. 21, 2004, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U. S. C. 307 as provided in 37 CFR 1.570(e), for ex parte reexamination, or the reexamination certificate required by 35 U. S. C. 316 as provided in 37 CFR 1.997(e) for inter partes reexamination.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: August 24, 2010
    Assignee: Elementis Specialties, Inc.
    Inventors: Mahalingam Santhanam, Wilbur S. Mardis