Patents by Inventor Alexandra S. Locke

Alexandra S. Locke 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).

  • Process for producing acrylic acids and acrylates
    Patent number: 8889586
    Abstract: In one embodiment, the invention is to a catalyst composition, comprising vanadium and titanium. Preferably, the molar ratio of vanadium to titanium in an active phase of the catalyst composition is greater than 0.5:1.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: November 18, 2014
    Assignee: Celanese International Corporation
    Inventors: Dick Nagaki, Heiko Weiner, Josefina T. Chapman, Mark O. Scates, Alexandra S. Locke, Craig J. Peterson
  • Catalysts for producing acrylic acids and acrylates
    Patent number: 8802585
    Abstract: In one embodiment, the invention is to a catalyst composition comprising vanadium and titanium. The catalyst composition has a surface area of at least 22.6 m2/g and a plurality of pores, and the plurality of pores have a pore diameter of less than 11.9 nm.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: August 12, 2014
    Assignee: Celanese International Corporation
    Inventors: Heiko Weiner, Josefina T. Chapman, Alexandra S. Locke, Craig T. Peterson, Mark O. Scates, Dick Nagaki
  • Catalysts for producing acrylic acids and acrylates
    Patent number: 8735314
    Abstract: In one embodiment, the invention is to a catalyst composition comprising vanadium and titanium. The catalyst composition further comprises ethylene glycol and citric acid. Preferably, the catalyst composition is substantially free of oxalic acid and lactic acid.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: May 27, 2014
    Assignee: Celanese International Corporation
    Inventors: Dick Nagaki, Craig Peterson, Mark Scates, Heiko Weiner, Josefina T. Chapman, Alexandra S. Locke
  • Process for Producing Acrylic Acids and Acrylates
    Publication number: 20140135527
    Abstract: In one embodiment, the invention is to a catalyst composition, comprising vanadium and titanium. Preferably, the molar ratio of vanadium to titanium in an active phase of the catalyst composition is greater than 0.5:1.
    Type: Application
    Filed: January 8, 2014
    Publication date: May 15, 2014
    Applicant: Celanese International Corporation
    Inventors: Dick Nagaki, Heiko Weiner, Josefina T. Chapman, Mark O. Scates, Alexandra S. Locke, Craig J. Peterson
  • Processes for producing acrylic acids and acrylates
    Patent number: 8658822
    Abstract: In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of reacting an alkanoic acid and an alkylenating agent under conditions effective to produce a crude acrylate product. A molar ratio of alkylenating agent to alkanoic acid is maintained at a level of at least 1.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: February 25, 2014
    Assignee: Celanese International Corporation
    Inventors: Sean Mueller, Dick Nagaki, Craig J. Peterson, Mark O. Scates, Heiko Weiner, Josefina T. Chapman, Alexandra S. Locke
  • Catalyst for producing acrylic acids and acrylates
    Patent number: 8652988
    Abstract: In one embodiment, the invention is to a catalyst composition, comprising vanadium and titanium. Preferably, the molar ratio of vanadium to titanium in an active phase of the catalyst composition is greater than 0.5:1.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: February 18, 2014
    Assignee: Celanese International Corporation
    Inventors: Dick Nagaki, Heiko Weiner, Josefina T. Chapman, Mark O. Scates, Alexandra S. Locke, Craig J. Peterson
  • Catalysts for producing acrylic acids and acrylates
    Patent number: 8642498
    Abstract: In one embodiment, the invention is to a catalyst composition comprising vanadium, titanium; and at least one oxide additive. The at least one oxide additive is present in an amount of at least 0.1 wt % based on the total weight of the catalyst composition. The molar ratio of titanium to metal additive in an active phase of the catalyst composition is at least 0.05:1.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: February 4, 2014
    Assignee: Celanese International Corporation
    Inventors: Dick Nagaki, Heiko Weiner, Josefina T. Chapman, Mark O. Scates, Alexandra S. Locke, Craig J. Peterson
  • CATALYSTS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES
    Publication number: 20130085293
    Abstract: In one embodiment, the invention is to a catalyst composition comprising vanadium and titanium. The catalyst composition further comprises ethylene glycol and citric acid. Preferably, the catalyst composition is substantially free of oxalic acid and lactic acid.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Dick Nagaki, Craig Peterson, Mark Scates, Heiko Weiner, Josefina T. Chapman, Alexandra S. Locke
  • CATALYSTS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES
    Publication number: 20130079553
    Abstract: In one embodiment, the invention is to a catalyst composition comprising vanadium and titanium. The catalyst composition has a surface area of at least 22.6 m2/g and a plurality of pores, and the plurality of pores have a pore diameter of less than 11.9 nm.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 28, 2013
    Applicant: Celanese International Corporation
    Inventors: Heiko Weiner, Josefina T. Chapman, Alexandra S. Locke, Craig J. Peterson, Mark O. Scates, Dick Nagaki
  • CATALYSTS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES
    Publication number: 20130053599
    Abstract: In one embodiment, the invention is to a catalyst composition comprising titanium, phosphorus, and less than 1 wt. % vanadium. The catalyst composition has a molar ratio of phosphorus to titanium of at least 1.0:1.0.
    Type: Application
    Filed: August 22, 2011
    Publication date: February 28, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Heiko Weiner, Josefina T. Chapman, Alexandra S. Locke, Dick Nagaki, Craig J. Peterson, Mark O. Scates
  • CATALYSTS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES
    Publication number: 20120289743
    Abstract: In one embodiment, the invention is to a catalyst composition comprising vanadium, titanium; and at least one oxide additive. The at least one oxide additive is present in an amount of at least 0.1 wt % based on the total weight of the catalyst composition. The molar ratio of titanium to metal additive in an active phase of the catalyst composition is at least 0.05:1.
    Type: Application
    Filed: May 11, 2011
    Publication date: November 15, 2012
    Applicant: Celanese International Corporation
    Inventors: Dick Nagaki, Heiko Weiner, Josefina T. Chapman, Mark O. Scates, Alexandra S. Locke, Craig J. Peterson
  • CATALYST FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES
    Publication number: 20120277466
    Abstract: In one embodiment, the invention is to a catalyst composition, comprising vanadium and titanium. Preferably, the molar ratio of vanadium to titanium in an active phase of the catalyst composition is greater than 0.5:1.
    Type: Application
    Filed: April 27, 2011
    Publication date: November 1, 2012
    Applicant: Celanese International Corporation
    Inventors: Dick Nagaki, Heiko Weiner, Josefina T. Chapman, Mark O. Scates, Alexandra S. Locke, Craig J. Peterson