Patents by Inventor Mark Brandon Shiflett

Mark Brandon Shiflett 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: 8808659
    Abstract: A process and a reactor system for producing ammonia is described. The ammonia produced, such as by the Haber process, is absorbed into an ionic liquid. The removal of ammonia shifts the reaction equilibrium toward the production of ammonia, resulting in higher yields of ammonia.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: August 19, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Patent number: 8779220
    Abstract: A method for capturing certain fluorinated vinyl monomers from a gaseous mixture using ionic liquids is described. The gaseous mixture is contacted with at least one ionic liquid, whereby at least a portion of the fluorinated vinyl monomer is absorbed by the ionic liquid. The method is useful for reducing emissions of fluorinated vinyl monomers and for increasing the product yields in the manufacture of polymers from these monomers.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: July 15, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Charles Joseph Noelke, Mark Brandon Shiflett
  • Patent number: 8771626
    Abstract: This invention relates to a process for purifying at least one of perfluoromethane and nitrogen trifluoride from a mixture thereof using an ionic liquid. The process may be performed by a technique such as extractive distillation or absorption wherein at least one ionic liquid is used as the entraining agent or absorbent, respectively.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: July 8, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Publication number: 20140162921
    Abstract: A multi-purpose lubricant is described. In accordance with one implementation, a lubricant comprises food grade based oils substantially complying with USDA H-1 specifications for incidental contact with food, wherein at least one oil is selected from the group consisting of food grade plant oil, food grade poly-alpha-olefin, polyalkylene glycol, and mixtures thereof. In accordance with another implementation, a lubricant comprises canola oil, castor oil and a poly-alpha-olefin. In accordance with yet another implementation, a lubricant comprises canola oil, castor oil and a polyalkylene glycol. In accordance with yet another implementation, a lubricant comprises an oil substantially complying with USDA H-2 specification wherein the oil is at least one item selected from the group consisting of plant oil, poly-alpha-olefin, polyalkylene glycol, and mixtures thereof. In some implementations, the multi-purpose lubricant may be applied to areas of a bicycle chain.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Inventors: Mark Brandon Shiflett, Kurt Richard Mikeska
  • Patent number: 8721770
    Abstract: This invention relates to compounds useful as ionic liquids that are based on an N-substituted pyrrolidinone and incorporate a pendant ammonium cation that is spaced from the pyrrolidone ring by a variable length linker; and to methods of carbon dioxide removal in which they may be used.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: May 13, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Thomas Foo, Mark Andrew Harmer, Keith W. Hutchenson, Christopher P. Junk, Berlyn R. Mellein, Aaron Minter, Mark Brandon Shiflett
  • Patent number: 8715521
    Abstract: The present invention relates to an absorption cycle comprising a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides an absorption cycle that utilizes fluorocarbon gases in fluorinated ionic liquids. The present invention also provides a method of cooling using an absorption cycle comprising a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides a method of heating using an absorption cycle comprising a refrigerant pair comprising at least one refrigerant and at least one ionic liquid.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: May 6, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Patent number: 8707720
    Abstract: The present invention relates to a hybrid vapor compression—absorption cooling or heating system and apparatus containing a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides for the performance of a hybrid vapor compression—absorption cycle that utilizes refrigerants and absorbents such as fluorocarbon gases in fluorinated ionic liquids. The present invention also provides a method of cooling by the execution of a hybrid vapor compression—absorption cycle using a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides a method of heating by the execution of a hybrid vapor compression—absorption cycle using a refrigerant pair comprising at least one refrigerant and at least one ionic liquid.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: April 29, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Publication number: 20130327084
    Abstract: This invention relates to a composition comprising water and at least one ionic liquid, and also to devices capable of executing an absorption cycle using such compositions as a refrigerant pair. This invention also provides a method of cooling using an absorption cycle comprising water as the refrigerant and at least one ionic liquid as the absorbent. The present invention also provides a method of heating using an absorption cycle comprising water as the refrigerant and at least one ionic liquid.
    Type: Application
    Filed: August 12, 2013
    Publication date: December 12, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: MARK BRANDON SHIFLETT, Akimichi Yokozeki
  • Patent number: 8568608
    Abstract: This invention relates to the use of ionic liquids as lubricants in vapor compression systems for cooling or heating. This invention also relates to an apparatus for adjusting temperature that operates a vapor compression cycle.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: October 29, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Publication number: 20130267668
    Abstract: An improved process for polymerization of a fluorinated vinyl monomer to produce a fluorinated polymer is described. The polymerization process comprises the free radical polymerization of a fluorinated vinyl monomer in a biphasic reaction medium, which comprises an ionic liquid containing a fluorinated vinyl monomer and an aqueous solution comprising a water-soluble free radical initiator. The ionic liquid is used to store quantities of the vinyl monomer, due to the high solubility of the vinyl monomer in the ionic liquid, thereby reducing the pressure required for the polymerization.
    Type: Application
    Filed: April 8, 2013
    Publication date: October 10, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Brian D. Mather, Mark Brandon Shiflett
  • Publication number: 20130231448
    Abstract: A process for separating tetrafluoroethylene from a mixture comprising tetrafluoroethylene and carbon dioxide by contacting the mixture with at least one ionic liquid.
    Type: Application
    Filed: November 19, 2012
    Publication date: September 5, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Mark Brandon SHIFLETT, Akimichi YOKOZEKI
  • Patent number: 8506839
    Abstract: This invention relates to a composition comprising water and at least one ionic liquid, and also to devices capable of executing an absorption cycle using such compositions as a refrigerant pair. This invention also provides a method of cooling using an absorption cycle comprising water as the refrigerant and at least one ionic liquid as the absorbent. The present invention also provides a method of heating using an absorption cycle comprising water as the refrigerant and at least one ionic liquid.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: August 13, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Patent number: 8454921
    Abstract: This invention relates to adsorbents useful for storing hydrogen and other small molecules, and to methods for preparing such adsorbents. The adsorbents are produced by heating carbonaceous materials to a temperature of at least 900° C. in an atmosphere of hydrogen.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: June 4, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Subramaniam Sabesan, Steven Raymond Lustig, Pratibha Laxman Gai
  • Publication number: 20130123448
    Abstract: A method for capturing certain fluorinated vinyl monomers from a gaseous mixture using ionic liquids is described. The gaseous mixture is contacted with at least one ionic liquid, whereby at least a portion of the fluorinated vinyl monomer is absorbed by the ionic liquid. The method is useful for reducing emissions of fluorinated vinyl monomers and for increasing the product yields in the manufacture of polymers from these monomers.
    Type: Application
    Filed: May 9, 2012
    Publication date: May 16, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: CHARLES JOSEPH NOELKE, Mark Brandon Shiflett
  • Publication number: 20130061612
    Abstract: A process and system for storing and recovering a secondary refrigerant such as carbon dioxide in a secondary loop refrigeration system after a shutdown of the primary refrigeration system using ionic liquids is described. The process eliminates the release of the secondary refrigerant into the environment and the need to recharge the secondary loop after a shutdown of the primary refrigeration system.
    Type: Application
    Filed: November 10, 2010
    Publication date: March 14, 2013
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Patent number: 8313558
    Abstract: A process for separating tetrafluoroethylene from a mixture comprising tetrafluoroethylene and carbon dioxide by contacting the mixture with at least one ionic liquid.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: November 20, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Publication number: 20120165579
    Abstract: This invention relates to a process for separating 1,1,2,2-tetrafluoroethane or 1,1,1,2-tetrafluoroethane from a mixture comprising both 1,1,1,2-tetrafluoroethane and 1,1,2,2-tetrafluoroethane wherein at least one ionic liquid is used to enhance the efficiency of the separation.
    Type: Application
    Filed: June 20, 2011
    Publication date: June 28, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: MARK BRANDON SHIFLETT, AKIMICHI YOKOZEKI, JEFFREY P. KNAPP
  • Patent number: 8137647
    Abstract: Provided are processes for the production of titanium dioxide from ilmenite. In these processes, ilmenite is digested with aqueous ammonium hydrogen oxalate. Iron from the ilmenite precipitates as a hydrated iron oxalate and is removed by filtering, leaving a titanium-rich solution. The titanium-rich solution can be further processed to form titanium dioxide.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: March 20, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David Richard Corbin, Thomas Paul Griffin, Keith W. Hutchenson, Sheng Li, Mark Brandon Shiflett, Carmine Torardi, Joseph J. Zaher
  • Publication number: 20120027661
    Abstract: A process and a reactor system for producing ammonia is described. The ammonia produced, such as by the Haber process, is absorbed into an ionic liquid. The removal of ammonia shifts the reaction equilibrium toward the production of ammonia, resulting in higher yields of ammonia.
    Type: Application
    Filed: January 27, 2011
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki
  • Publication number: 20120017613
    Abstract: This invention relates to a temperature adjustment device that executes an absorption cooling or heating cycle in which a lithium halide, typically a lithium bromide, absorbent is used.
    Type: Application
    Filed: March 31, 2010
    Publication date: January 26, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Thomas Foo, Edward R. Murphy, Dennis A. Redder, Mark A. Scialdone, Mark Brandon Shiflett