Patents by Inventor Sigridur Soley Kristjansdottir

Sigridur Soley Kristjansdottir 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).

  • Patent number: 9162973
    Abstract: A method for preparing a compound of Formula 1 comprising contacting a compound of Formulae 2 and 3 in the presence of a palladium source, a ligand, a base and carbon monoxide wherein R1, R2, X and R3 are as defined in the disclosure. A method for preparing a compound of Formula 5 wherein R1, R2, R3, R4, R5, R6 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing a compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method above.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: October 20, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Sigridur Soley Kristjansdottir, Rafael Shapiro, Matthew Richard Oberholzer
  • Patent number: 9067247
    Abstract: A process for treating a tailings stream comprises (a) contacting a deionized silicate solution with a tailings stream whereby the solids are entrapped within a gel produced from the silicate solution; and (b) allowing the gel to strengthen and solidify. The process may further comprise spreading the gel produced in step (a) over a surface. The present invention is particularly useful to treat tailings streams produced in processes to extract bitumen from oil sands ores.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: June 30, 2015
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Robert Harvey Moffett, Sigridur Soley Kristjansdottir
  • Publication number: 20150005503
    Abstract: A method for preparing a compound of Formula 1 comprising contacting a compound of Formulae 2 and 3 in the presence of a palladium source, a ligand, a base and carbon monoxide wherein R1, R2, X and R3 are as defined in the disclosure. A method for preparing a compound of Formula 5 wherein R1, R2, R3, R4, R5, R6 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing a compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method above.
    Type: Application
    Filed: September 16, 2014
    Publication date: January 1, 2015
    Inventors: SIGRIDUR SOLEY KRISTJANSDOTTIR, RAFAEL SHAPIRO, MATTHEW RICHARD OBERHOLZER
  • Patent number: 8871939
    Abstract: A method for preparing a compound of Formula 1 comprising contacting a compound of Formulae 2 and 3 in the presence of a palladium source, a ligand, a base and carbon monoxide wherein R1, R2, X and R3 are as defined in the disclosure. A method for preparing a compound of Formula 5 wherein R1, R2, R3, R4, R5, R6 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing a compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method above.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: October 28, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Sigridur Soley Kristjansdottir, Rafael Shapiro, Matthew Richard Oberholzer
  • Publication number: 20130310567
    Abstract: A method for preparing a compound of Formula 1 comprising contacting a compound of Formulae 2 and 3 in the presence of a palladium source, a ligand, a base and carbon monoxide wherein R1, R2, X and R3 are as defined in the disclosure. A method for preparing a compound of Formula 5 wherein R1, R2, R3, R4, R5, R6 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing a compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method above.
    Type: Application
    Filed: January 27, 2012
    Publication date: November 21, 2013
    Applicant: EI DU PONT DE NEMOURS AND COMPANY
    Inventors: Sigridur Soley Kristjansdottir, Rafael Shapiro, Matthew Richard Oberholzer
  • Patent number: 8148491
    Abstract: This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: April 3, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: David C. Confer, Mark Andrew Harmer, Christian Hoffmann, Scott Christopher Jackson, Sigridur Soley Kristjansdottir, Rupert Spence
  • Patent number: 8030422
    Abstract: Disclosed herein are novel polymer-tethered ligands, metal complexes comprising these ligands, and the use of these complexes as chain transfer catalysts to control the molecular weight of oligomeric and polymeric materials produced in a radical polymerization process. The materials made by the processes disclosed herein have significantly reduced color, making them suitable for a wide range of color-critical end-uses, including automotive coatings.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: October 4, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Henry Edward Brynzda, Michael Charles Grady, Sigridur Soley Kristjansdottir, Christina M. Older, Matthew Arthur Page, Joachim C. Ritter, Wilson Tam
  • Publication number: 20100261851
    Abstract: Disclosed herein are novel polymer-tethered ligands, metal complexes comprising these ligands, and the use of these complexes as chain transfer catalysts to control the molecular weight of oligomeric and polymeric materials produced in a radical polymerization process. The materials made by the processes disclosed herein have significantly reduced color, making them suitable for a wide range of color-critical end-uses, including automotive coatings.
    Type: Application
    Filed: August 16, 2006
    Publication date: October 14, 2010
    Inventors: Henry Edward Bryndza, Michael Charles Grady, Sigridur Soley Kristjansdottir, Christina M. Older, Matthew Arthur Page, Joachim C. Ritter, Wilson Tam
  • Publication number: 20090118465
    Abstract: This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 7, 2009
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: David C. Confer, Mark Andrew Harmer, Christian Hoffmann, Scott Christopher Jackson, Sigridur Soley Kristjansdottir, Rupert Spence
  • Patent number: 6855799
    Abstract: A polymeric composition, a process for producing the composition, and a process for using the composition in, for example, hydrocyanation or isomerization are disclosed. The composition comprises repeat units derived from (1) a carbonyl compound, a monomer, and phosphorochloridite; (2) phosphorus trichloride, a polyhydric alcohol, and an aromatic diol; or (3) combinations of (1) and (2) in which the monomer can be a polyhydric alcohol, an amine, combinations thereof. The composition can further comprise a Group VIII metal and optionally a Lewis acid.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: February 15, 2005
    Inventors: Wilson Tam, Sigridur Soley Kristjansdottir, Robin Nikolas Greene
  • Publication number: 20010049431
    Abstract: A polymeric composition, a process for producing the composition, and a process for using the composition in, for example, hydrocyanation or isomerization are disclosed. The composition comprises repeat units derived from (1) a carbonyl compound, a monomer, and phosphorochloridite; (2) phosphorus trichloride, a polyhydric alcohol, and an aromatic diol; or (3) combinations of (1) and (2) in which the monomer can be a polyhydric alcohol, an amine, combinations thereof. The composition can further comprise a Group VIII metal and optionally a Lewis acid.
    Type: Application
    Filed: May 25, 2001
    Publication date: December 6, 2001
    Inventors: Wilson Tam, Sigridur Soley Kristjansdottir, Robin Nikolas Greene
  • Patent number: 6284865
    Abstract: A polymeric composition, a process for producing the composition, and a process for using the composition in, for example, hydrocyanation or isomerization are disclosed. The composition comprises repeat units derived from (1) a carbonyl compound, a monomer, and phosphorochloridite; (2) phosphorus trichloride, a polyhydric alcohol, and an aromatic diol; or (3) combinations of (1) and (2) in which the monomer can be a polyhydric alcohol, an amine, combinations thereof. The composition can further comprise a Group VIII metal and optionally a Lewis acid.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: September 4, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Wilson Tam, Sigridur Soley Kristjansdottir, Robin Nikolas Greene
  • Patent number: 6103937
    Abstract: A process for producing unsaturated nitrogen containing compounds such as enamides, enamines and aryl amineslamides is disclosed. A vinyl halide or aryl halide is reacted with an --NH-- containing compound in the presence of a catalytic amount of a catalyst precursor composition comprising a zero-valent nickel and an organophosphine or carbene ligand. One step coupling of vinyl halides and aryl halides with --NH-- containing compounds is made possible by practice of the invention.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: August 15, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ralph Thomas Baker, Sigridur Soley Kristjansdottir