Patents Assigned to Sigma-Aldrich Co. LLC
  • Publication number: 20120177845
    Abstract: A method for forming a cobalt-containing thin film by a vapor deposition process is provided. The method comprises using at least one precursor corresponding in structure to Formula (I); wherein R1 and R2 are independently C2-C8-alkyl; x is zero, 1 or 2; and y is zero or 1; wherein both x and y can not be zero simultaneously.
    Type: Application
    Filed: July 27, 2010
    Publication date: July 12, 2012
    Applicant: Sigma-Aldrich Co. LLC
    Inventors: Rajesh Odedra, Neil Boag, Jeff Anthis, Ravi Kanjolia
  • Patent number: 8182581
    Abstract: The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising diionic liquids and the use of diionic liquids as the stationary phase in a gas chromatographic column.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: May 22, 2012
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: Daniel W. Armstrong, Jared Anderson
  • Publication number: 20120123094
    Abstract: The present invention provides a greener method for the production of polyamino acid random copolymers containing alanine, glutamic acid, lysine and tyrosine. In particular, the present invention provides a greener method for the production of Copolymer 1 or a pharmaceutically acceptable salt thereof via a synthetic route that only requires a single deprotection step.
    Type: Application
    Filed: November 14, 2011
    Publication date: May 17, 2012
    Applicant: SIGMA-ALDRICH CO. LLC.
    Inventor: Ettigounder Ponnusamy
  • Patent number: 8168830
    Abstract: The present invention relates to diionic liquid salts of dicationic or dianionic molecules, as well as solvents comprising such diionic liquids and the use of such diionic liquids as the stationary phase in a gas chromatographic column.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: May 1, 2012
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: Daniel W. Armstrong, Jared Anderson
  • Publication number: 20120083603
    Abstract: Polyionic liquid salts are provided comprising polycationic or polyanionic molecules. Further provided are solvents comprising one or more polyionic liquid salts, and the use of such polyionic liquid salts as stationary phases in gas chromatography, and as a reagent in electrospray ionization-mass spectrometry (ESI-MS).
    Type: Application
    Filed: December 13, 2011
    Publication date: April 5, 2012
    Applicant: Sigma-Aldrich Co. LLC
    Inventors: Daniel W. Armstrong, Junmin Huang
  • Publication number: 20120071612
    Abstract: The present invention provides a method for the production of polyamino acid copolymers. In particular, the method may be utilized to produce high quality polyamino acid random copolymers.
    Type: Application
    Filed: March 8, 2010
    Publication date: March 22, 2012
    Applicant: SIGMA-ALDRICH CO., LLC
    Inventor: Ettigounder Ponnusamy
  • Patent number: 8138330
    Abstract: The present invention discloses novel methods for the synthesis of oligonucleotides with nucleoside phosphoramidites on solid supports. The methods comprise the stepwise chain assembly of oligonucleotides on supports with 5?-acyl phosphoramidites. The synthesis cycles consist of a front end deprotection step which is conducted with a solution of a primary amine or a phenolate, a phosphoramidite coupling step with a 5?-acyl nucleoside phosphoramidite in the presence of an activator, a phosphite oxidation step and an optional capping step. The novel methods improve the quality of synthetic oligonucleotides due to the irreversibility of the front end deprotection step, which prevents the formation of deletion sequences, and due to the avoidance of acidic reagents in the synthesis cycles, which prevent the formation of depurination side products.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: March 20, 2012
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: Michael Leuck, Andreas Wolter, Alfred Stumpe
  • Publication number: 20120030778
    Abstract: The present invention provides genetically modified animals and cells comprising edited chromosomal sequences encoding proteins associated with Parkinson's disease. In particular, the animals or cells are generated using a zinc finger nuclease-mediated editing process. Also provided are methods of assessing the effects of agents in genetically modified animals and cells comprising edited chromosomal sequences encoding proteins associated with Parkinson's disease.
    Type: Application
    Filed: July 27, 2011
    Publication date: February 2, 2012
    Applicant: SIGMA-ALDRICH CO., LLC.
    Inventors: Edward Weinstein, Phil Simmons
  • Patent number: 8097721
    Abstract: Polyionic liquid salts are provided comprising polycationic or polyanionic molecules. Further provided are solvents comprising one or more polyionic liquid salts, and the use of such polyionic liquid salts as stationary phases in gas chromatography, and as a reagent in electrospray ionization-mass spectrometry (ESI-MS).
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: January 17, 2012
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: Daniel W. Armstrong, Junmin Huang
  • Patent number: 8092770
    Abstract: This invention relates to an amorphous non-glassy ceramic composition that may be prepared by curing, calcining and/or pyrolyzing a precursor material comprising silicon, a Group III metal, a Group IVA metal, and/or a Group IVB metal.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: January 10, 2012
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: William R. Betz, Christopher M. Linton
  • Patent number: 8088350
    Abstract: This invention relates to an amorphous non-glassy ceramic composition that may be prepared by curing, calcining and/or pyrolyzing a precursor material comprising silicon, a Group III metal, a Group IVA metal, and/or a Group IVB metal.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: January 3, 2012
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: William R. Betz, Christopher M. Linton
  • Patent number: 8039062
    Abstract: Methods of forming a metal-containing film by atomic layer deposition is provided. The methods comprise delivering at least one precursor to a substrate, wherein the at least one precursor corresponds in structure to Formula II: wherein: M is Hf or Zr; R is C1-C6-alkyl; n is zero, 1, 2, 3, 4 or 5; L is C1-C6-alkoxy. Further methods are provided of forming a metal-containing film by liquid injection atomic layer deposition. The methods comprise delivering at least one precursor to a substrate, wherein the at least one precursor corresponds in structure to Formula III: wherein: M is Hf or Zr; R is C1-C6-alkyl; n is zero, 1, 2, 3, 4 or 5; L is amino, wherein the amino is optionally independently substituted 1 or 2 times with C1-C6-alkyl.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: October 18, 2011
    Assignee: Sigma-Aldrich Co. LLC
    Inventors: Peter Nicholas Heys, Andrew Kingsley, Fuquan Song, Paul Williams, Thomas Leese, Hywel Owen Davies, Rajesh Odedra