Patents Represented by Attorney Raymond F. Keller
  • Patent number: 6488759
    Abstract: One aspect of the invention relates to pigment composition containing a monoarylide pigment and a hydrocarbyl polypropyleneamine compound. Another aspect of the invention relates to making an monoarylide pigment involving coupling a substituted or unsubstituted acetoacetanilide with at least one diazotized aromatic amine in a solution containing a hydrocarbyl polypropyleneamine. Yet another aspect of the invention relates to paint, ink, electrostatic toner, powder coating, and paper compositions containing the pigment composition or monoarylide pigment made in accordance with the invention.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: December 3, 2002
    Assignee: Engelhard Corporation
    Inventor: Byron G. Hays
  • Patent number: 6469112
    Abstract: One aspect of the present invention relates to a catalyst system for use in olefinic polymerization, containing a solid titanium catalyst component; an organoaluminum compound having at least one aluminum-carbon bond; and an organosilicon compound comprising a (cycloalkyl)methyl group. Another aspect of the present invention relates to a method of making a catalyst for use in olefinic polymerization, involving the steps of reacting a Grignard reagent having a (cycloalkyl)methyl group with an orthosilicate to provide an organosilicon compound having a (cycloalkyl)methyl moiety; and combining the organosilicon compound with an organoaluminum compound having at least one aluminum-carbon bond and a solid titanium catalyst component to form the catalyst.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: October 22, 2002
    Assignee: Engelhard Corporation
    Inventors: Chung-Ping Cheng, Michael D. Spencer
  • Patent number: 6464995
    Abstract: Disclosed are horticultural substrates coated with a particulate membrane and a method for controlling pests and providing enhanced horticultural effect by applying a particulate membrane to the surface of the horticultural substrate.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: October 15, 2002
    Assignees: Engelhard Corporation, The United States of America as represented by the Secretary of Agriculture
    Inventors: Dennis G. Sekutowski, Gary J. Puterka, David Michael Glenn
  • Patent number: 6375733
    Abstract: Disclosed are blue shade red to magenta monoazo pigments which are obtained by diazotization of 5-alkoxy-2-aminobenzenesulfonic acids, coupling of the diazonium compound with a hydoxynaphthalenesulfonic acid and subsequent laking of the coupling product with a divalent metal salt. The pigments are characterized by the formula: wherein R is a lower alkyl, e.g. a methyl or ethyl group, or a hydroxycarbyl group, R1 is hydrogen, chloro, a lower alkyl group such as methyl or ethyl, or a lower alkoxy group such as a methoxy or an ethoxy group, and M is Ca, Sr, Ba, Mn, Mg or Zn. The new pigments have a magenta color, excellent heat stability, bleed fastness and very high color strength. These pigments are suitable for the pigmenting of plastics, inks and coatings, among other materials.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: April 23, 2002
    Assignee: Engelhard Corporation
    Inventor: Amrit P. Bindra
  • Patent number: 6346145
    Abstract: Flux calcined kaolin clay especially useful as a pigment for low sheen paints is obtained by mixing hydrous kaolin with an aqueous solution of alkaline flux, spray drying, pulverizing, calcining and repulverizing.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: February 12, 2002
    Assignee: Engelhard Corporation
    Inventors: John Hen, Ray Young, Andres Ginez, Sharad Mathur
  • Patent number: 6294012
    Abstract: Disclosed is a yellow monoazo pigment which is obtained by diazotization of anthranilic acid, coupling of the diazonium compound with 1-(3′-sulfophenyl)-3-methyl-5-pyrazolone and subsequent laking of the coupling product to a strontium salt. The pigment is characterized by the formula: The new pigment has excellent heat stability and bleed fastness and very high color strength. It is suitable for pigmenting of plastics, inks and coatings, and particularly suitable for pigmenting of plastics.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: September 25, 2001
    Assignee: Engelhard Corporation
    Inventor: Amrit P. Bindra
  • Patent number: 6254671
    Abstract: In one embodiment, the present invention relates to a green shade yellow pigment composition comprising a compound having the formula: wherein R1 and R2 are independently hydrogen, halogen, an alkyl group having 1 to about 4 carbon atoms, an alkoxy group having 1 to about 4 carbon atoms, an alkoxycarbonyl group having 1 to about 6 carbon atoms, nitro, cyano, phenoxy or trifluoromethyl; and M2+ is a divalent metal. The green shade yellow pigment composition is suitable for use in plastics, paints, inks, electrostatic toners, powder coatings, and paper.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: July 3, 2001
    Assignee: Engelhard Corporation
    Inventor: Byron G. Hays
  • Patent number: 6235106
    Abstract: One aspect of the invention relates to a blue shade black pigment composition, containing at least iron oxide, chrome oxide, wherein the ratio of iron to chromium is from about 1:1 to about 5:1 by weight; and manganese oxide. Another aspect of the invention relates to a method of making a blue shade black pigment involving combining iron oxide, chrome oxide, and manganese oxide to form a mixture; heating the mixture to a temperature from about 700° C. to about 1,300° C. for a time from about 1 to about 5 hours; and optionally agitating the heated mixture to provide the blue shade black pigment. Yet another aspect of the invention relates to a plastic composition containing a plastic material and a blue shade black pigment composition containing at least iron oxide, chrome oxide, and manganese oxide.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: May 22, 2001
    Assignee: Engelhard Corporation
    Inventors: William Gerald Loucka, Mark Edward Gall, Jerome David Thomas
  • Patent number: 6235683
    Abstract: In one embodiment, the present invention relates to a method for enhancing supercooling of a plant to temperatures below about −2° C., involving preventing the formation of ice crystals adjacent the plant by forming a substantially continuous hydrophobic membrane of particulate materials on portions of the plant capable of supporting droplets of water, the particulate material having a particle size distribution wherein up to about 90% by weight of the particles have a particle size of about 100 &mgr;m or less, and the substantially continuous hydrophobic membrane has a thickness from about 1 &mgr;m to about 1,000 &mgr;m.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: May 22, 2001
    Assignees: Engelhard Corporation, The United States of America as represented by the Secretary of Agriculture
    Inventors: David Michael Glenn, Michael Wisniewski, Gary J. Puterka, Dennis G. Sekutowski
  • Patent number: 6235100
    Abstract: In one embodiment, the present invention relates to a method of preparing a medium shade yellow pigment composition comprising making an azo pigment by coupling (i) two or more diazonium components made from two or more aromatic amines including 2-amino-5-chloro-4-ethylbenzene-1-sulfonic acid and 2-amino-4-chloro-5-methylbenzene-1-sulfonic acid with (ii) at least 1-(3′-sulfophenyl)-3-methyl-5-pyrazolone, and metallizing the azo pigment with a divalent metal to provide the medium shade yellow pigment composition. The medium shade yellow pigment composition is suitable for use in plastics, paints and inks.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: May 22, 2001
    Assignee: Engelhard Corporation
    Inventor: Byron G. Hays
  • Patent number: 6231632
    Abstract: In one embodiment, the present invention relates to a particulate urea composition containing particulate urea; kaolin; and a dispersant, wherein the dispersant is at least one of ammonia based dispersants, sulfonate dispersants, carboxylic acid dispersants and polymeric dispersants. In another embodiment, the present invention relates to a method of making urea, involving the steps of contacting a urea process stream with a slurry comprising a liquid, kaolin, and a dispersant, wherein the dispersant is at least one of ammonia based dispersants, sulfonate dispersants, carboxylic acid dispersants and polymeric dispersants; and recovering urea.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: May 15, 2001
    Assignee: Engelhard Corporation
    Inventors: Karen A. Gruber, Shireen A. Mamun
  • Patent number: 6221148
    Abstract: In one embodiment, the present invention relates to a method of making a highly reactive pozzolan, involving the steps of forming a slurry comprising metakaolin and a liquid; wet milling the slurry; and separating the metakaolin from the liquid to provide the highly reactive pozzolan. In another embodiment, the present invention relates to a method of making a cement-based composition involving the steps of providing a highly reactive pozzolan by forming a slurry comprising metakaolin and a liquid, wet milling the slurry, and separating the metakaolin from the liquid; and combining the highly reactive pozzolan with at least one cementitious material.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: April 24, 2001
    Assignee: Engelhard Corporation
    Inventors: Sharad Mathur, Karen Ann Gruber, Harry J. Reid
  • Patent number: 6156327
    Abstract: Disclosed are horticultural substrates coated with a particulate membrane and a method for controlling pests and providing enhanced horticultural effect by applying a particulate membrane to the surface of the horticultural substrate.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: December 5, 2000
    Assignees: Engelhard Corporation, The United States of America as represented by the Secretary of Agriculture
    Inventors: Dennis G. Sekutowski, Gary J. Puterka, David Michael Glenn
  • Patent number: 6156927
    Abstract: One aspect of the present invention relates to a method of making vinyl acetate monomer, involving contacting reactant gases with a catalyst containing palladium, gold and a support in the presence of clean steam, the clean steam present from about 2 to about 10 psia, with the proviso that the support does not contain alumina or zinc oxide and the support is not treated with a sulfur containing compound. For example, the method of making vinyl acetate monomer may involve the reaction scheme:O.sub.2 +H.sub.2 O+CH.sub.2 CH.sub.2 +CH.sub.3 CO.sub.2 H.fwdarw.CH.sub.3 CO.sub.2 CH.dbd.CH.sub.2 +H.sub.2 O.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: December 5, 2000
    Assignee: Engelhard Corporation
    Inventors: Donald B. Halcom, Ronald L. Jagta
  • Patent number: 6136086
    Abstract: Flux calcined kaolin clay especially useful as a pigment for low sheen paints is obtained by mixing hydrous kaolin with an aqueous solution of alkaline flux, spray drying, pulverizing, calcining and repulverizing.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: October 24, 2000
    Assignee: Englehard Corporation
    Inventors: John Hen, Ray Young, Andres Ginez, Sharad Mathur
  • Patent number: 6110867
    Abstract: Disclosed is a method for enhancing the photosynthesis of horticultural crops which involves treating the surface of said horticultural crop with an effective amount of one or more highly reflective particulate materials.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: August 29, 2000
    Assignee: Engelhard Corporation
    Inventors: David Michael Glenn, Dennis G. Sekutowski, Gary J. Puterka
  • Patent number: 6069112
    Abstract: In one embodiment, the present invention relates to a method for preventing sunburn, and other physiological disorders such as watercore, corking and bitterpit, without diminishing photosynthesis, comprising applying to at least a portion of a surface of a plant an effective amount of a finely divided particulate material to prevent sunburn, and other physiological disorders such as watercore, corking and bitterpit, in the plant, wherein the particulate material comprises a heat treated particulate material and the particulate material as applied permits an exchange of gases on the surface of the plant and the particulate material has a thickness from about 1 .mu.m to about 1,000 .mu.m.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: May 30, 2000
    Assignee: Englehard Corporation
    Inventors: David Michael Glenn, Dennis G. Sekutowski, Gary J. Puterka
  • Patent number: 6060521
    Abstract: Aqueous dispersion of a particulate solid containing a low boiling organic liquid in which the particulate solid has a hydrophobic outer surface which is suitable for applying to a substrate to form a continuous hydrophobic film thereon.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: May 9, 2000
    Assignee: Engelhard Corporation United States Department of Agriculture
    Inventors: Dennis G. Sekutowski, Gary J. Puterka, David Michael Glenn
  • Patent number: 6054627
    Abstract: Disclosed are catalysts in powdered form comprising a major amount of the oxides of a first metal selected from copper or zinc, a second metal selected from chromium, molybdenum, tungsten and vanadium, and optionally, a minor amount of the oxide of a promoter metal selected from the group consisting of manganese, barium, zinc, nickel, cobalt, cadmium, iron and any combination thereof provided that the promoter metal is not zinc if the first metal is zinc, wherein the average particle diameter of the powder is from about 6 to about 20 microns; and the particle surface area is from about 20 to about 70 m.sup.2 /g. Also disclosed is a process for preparing such catalysts and a process for hydrogenating aldehydes, ketones, carboxylic acids and carboxylic acid esters with catalysts of the type described.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: April 25, 2000
    Assignee: Engelhard Corporation
    Inventors: Deepak S. Thakur, Eugene Palka, Thomas I. Sullivan, Eugene Nebesh, Brian D. Roberts
  • Patent number: 6049008
    Abstract: Shaped catalyst compositions are disclosed comprising (i) at least one metal selected from the group consisting of copper, manganese, zinc, nickel, cobalt and iron, (ii) calcium silicate and (iii) at least one clay material. Also disclosed are a process for preparing the foregoing shaped compositions and a process for hydrogenating aldehydes, ketone, carboxylic acids, carboxylic acid esters and nitro aroniate compounds using these shaped catalysts.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: April 11, 2000
    Assignee: Engelhard Corporation
    Inventors: Brian D. Roberts, William J. Carrick, Deepak S. Thakur