Patents by Inventor Dinesh C. Aluthge

Dinesh C. Aluthge 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).

  • Mononuclear salen indium catalysts and methods of manufacture and use thereof
    Patent number: 10280185
    Abstract: The present application provides salen indium catalysts of the following general structure wherein R is a coordinating alkoxide comprising at least one coordinating atom that forms a dative bond with In. The mononuclear salen indium catalysts are particularly useful in catalyzing ring-opening polymerizations of cyclic ester monomers, such as lactides. Also provided herein are methods of using the mononuclear salen indium complexes to catalyze polymerization of cyclic ester monomers. Of particular interest is the successful polymerization of lactides using the mononuclear salen indium catalysts to produce poly(lactic acid) having high isotacticity.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: May 7, 2019
    Assignee: THE UNIVERSITY OF BRITISH COLUMBIA
    Inventors: Parisa Mehrkhodavandi, Dinesh C. Aluthge
  • Co-supported catalysts for the tandem trimerization and polymerization of ethylene to produce linear low density polyethylene
    Patent number: 9969828
    Abstract: Linear low density polyethylene (LLDPE) is produced from an ethylene-only feed over a tandem catalyst system consisting of a phenoxy-imine titanium trimerization catalyst and a silylene-linked cyclopentadienyl/amido titanium polymerization catalyst co-supported on the same methylaluminoxane/silica particles. The level of 1-hexene incorporation in the LLDPE can be controlled by varying the ethylene pressure. Tandem, co-silica-supported ethylene trimerization and ethylene/1-hexene copolymerization catalysts produce linear low density polyethylene (LLDPE) from an ethylene-only feedstock. The percentage 1-hexene incorporation in the LLDPE may be varied by adjusting the amounts of the two catalysts on the silica support.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: May 15, 2018
    Assignees: California Institute of Technology, King Fahd University of Petroleum and Minerals
    Inventors: Dinesh C. Aluthge, Aaron Sattler, Mamdouh Al-Harthi, Jay A. Labinger, John E. Bercaw
  • CO-SUPPORTED CATALYSTS FOR THE TANDEM TRIMERIZATION AND POLYMERIZATION OF ETHYLENE TO PRODUCE LINEAR LOW DENSITY POLYETHYLENE
    Publication number: 20170210834
    Abstract: Linear low density polyethylene (LLDPE) is produced from an ethylene-only feed over a tandem catalyst system consisting of a phenoxy-imine titanium trimerization catalyst and a silylene-linked cyclopentadienyl/amido titanium polymerization catalyst co-supported on the same methylaluminoxane/silica particles. The level of 1-hexene incorporation in the LLDPE can be controlled by varying the ethylene pressure. Tandem, co-silica-supported ethylene trimerization and ethylene/1-hexene copolymerization catalysts produce linear low density polyethylene (LLDPE) from an ethylene-only feedstock. The percentage 1-hexene incorporation in the LLDPE may be varied by adjusting the amounts of the two catalysts on the silica support.
    Type: Application
    Filed: January 20, 2017
    Publication date: July 27, 2017
    Applicants: California Institute of Technology, King Fahd University of Petroleum and Minerals
    Inventors: Dinesh C. Aluthge, Aaron Sattler, Mamdouh Al-Harthi, Jay A. Labinger, John E. Bercaw
  • MONONUCLEAR SALEN INDIUM CATALYSTS AND METHODS OF MANUFACTURE AND USE THEREOF
    Publication number: 20170137442
    Abstract: The present application provides salen indium catalysts of the following general structure wherein R is a coordinating alkoxide comprising at least one coordinating atom that forms a dative bond with In. The mononuclear salen indium catalysts are particularly useful in catalyzing ring-opening polymerizations of cyclic ester monomers, such as lactides. Also provided herein are methods of using the mononuclear salen indium complexes to catalyze polymerization of cyclic ester monomers. Of particular interest is the successful polymerization of lactides using the mononuclear salen indium catalysts to produce poly(lactic acid) having high isotacticity.
    Type: Application
    Filed: June 26, 2015
    Publication date: May 18, 2017
    Applicant: THE UNIVERSITY OF BRITISH COLUMBIA
    Inventors: Parisa Mehrkhodavandi, Dinesh C. Aluthge
  • SALEN INDIUM CATALYSTS AND METHODS OF MANUFACTURE AND USE THEREOF
    Publication number: 20150018493
    Abstract: The present application provides salen indium catalysts of the following general structure and the corresponding dimers. The salen indium catalysts are particularly useful in catalyzing ring-opening polymerizations of cyclic ester monomers, such as lactides. Also provided herein are methods of using the salen indium complexes to catalyze polymerization of cyclic ester monomers. Of particular interest is the successful polymerization of lactides using the present salen indium catalysts to produce poly(lactic acid) having high isotacticity.
    Type: Application
    Filed: March 13, 2013
    Publication date: January 15, 2015
    Applicant: GREENCENTRE CANADA
    Inventors: Parisa Mehrkhodavandi, Dinesh C. Aluthge, Timothy James Clark, Brian Mariampillai, Yun Yang