Patents by Inventor John Wind

John Wind 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).

  • Methods of making crosslinked membranes utilizing an inert gas atmosphere
    Patent number: 10029217
    Abstract: Disclosed herein is a method of making a crosslinked membrane such as a crosslinked hollow fiber membrane. The method comprises (a) preparing a polyimide polymer comprising carboxylic acid functional groups from a reaction solution comprising monomers and at least one solvent; (b) treating the polyimide polymer with a diol at esterification conditions to form a monoesterified polyimide polymer; (c) forming a monoesterified polyimide membrane or dense film from the monoesterified polyimide polymer; and (d) subjecting the monoesterified polyimide membrane or dense film to transesterification conditions under a CO2 atmosphere to form a crosslinked polyimide membrane or dense film.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: July 24, 2018
    Assignee: Chevron U.S.A. Inc.
    Inventors: Nitesh Bhuwania, Shabbir Hussain, Daniel Chinn, John Wind, Stephen Miller
  • Methods of Making Crosslinked Membranes Utilizing an Inert Gas Atmosphere
    Publication number: 20160339397
    Abstract: Disclosed herein is a method of making a crosslinked membrane such as a crosslinked hollow fiber membrane. The method comprises (a) preparing a polyimide polymer comprising carboxylic acid functional groups from a reaction solution comprising monomers and at least one solvent; (b) treating the polyimide polymer with a diol at esterification conditions to form a monoesterified polyimide polymer; (c) forming a monoesterified polyimide membrane or dense film from the monoesterified polyimide polymer; and (d) subjecting the monoesterified polyimide membrane or dense film to transesterification conditions under a CO2 atmosphere to form a crosslinked polyimide membrane or dense film.
    Type: Application
    Filed: May 22, 2015
    Publication date: November 24, 2016
    Applicant: Chevron U.S.A. Inc.
    Inventors: Nitesh Bhuwania, Shabbir Hussain, Daniel Chinn, John Wind, Stephen Miller
  • Crosslinked membrane and polymer for making same and method of using membrane
    Patent number: 8394182
    Abstract: A composition of and a method of making high performance crosslinked membranes are described. The membranes have a high resistance to plasticization by use of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising covalently bonded ester crosslinks. The resultant membrane exhibits a high permeability of CO2 in combination with a high CO2/CH4selectivity. Another embodiment provides a method of making the membrane from a monesterified polymer followed by final crosslinking after the membrane is formed.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: March 12, 2013
    Assignees: The University of Texas System, Chevron U.S.A. Inc.
    Inventors: William J. Koros, David Wallace, John Wind, Claudia Staudt-Bickel, Stephen J. Miller
  • Crosslinked and crosslinkable hollow fiber membrane and method of making same utility
    Patent number: 7247191
    Abstract: A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising covalently bonded ester crosslinks. The resultant hollow fiber membrane exhibits a high permeability of CO2 in combination with a high CO2/CH4 selectivity. Another embodiment provides a method of making the hollow fiber membrane from a monesterified polymer followed by final crosslinking after hollow fiber formation.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: July 24, 2007
    Assignee: Chevron U.S.A. Inc.
    Inventors: William J. Koros, David Wallace, John Wind, Stephen J. Miller, Claudia Staudt-Bickel
  • Crosslinked and crosslinkable hollow fiber membrane and method of making same utility
    Publication number: 20050268783
    Abstract: A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising covalently bonded ester crosslinks. The resultant hollow fiber membrane exhibits a high permeability of CO2 in combination with a high CO2/CH4 selectivity. Another embodiment provides a method of making the hollow fiber membrane from a monesterified polymer followed by final crosslinking after hollow fiber formation.
    Type: Application
    Filed: June 10, 2005
    Publication date: December 8, 2005
    Inventors: William Koros, David Wallace, John Wind, Stephen Miller, Claudia Staudt-Bickel
  • Crosslinked and crosslinkable hollow fiber mixed matrix membrane and method of making same
    Publication number: 20030131731
    Abstract: A composition of and a method of making high performance mixed matrix hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide polymer contineous phase comprising ester crosslinks and a molecular sieve material dispersed within the polymer contineous phase. The resultant mixed matrix hollow fiber membrane exhibits a high permeability of CO2 in combination with a high CO2/CH4 selectivity. Another embodiment provides a method of making the mixed matrix hollow fiber membrane from a monesterified polymer followed by final crosslinking after hollow fiber formation.
    Type: Application
    Filed: December 20, 2001
    Publication date: July 17, 2003
    Inventors: William J. Koros, David Wallace, Stephen J. Miller, Claudia Staudt-Bickel, John Wind, De Q. Vu
  • Crosslinked and crosslinkable hollow fiber membrane and method of making same
    Publication number: 20030126990
    Abstract: A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising ester crosslinks. The resultant hollow fiber membrane exhibits a high permeability of CO2 in combination with a high CO2/CH4selectivity. Another embodiment provides a method of making the hollow fiber membrane from a monesterified polymer followed by final crosslinking after hollow fiber formation.
    Type: Application
    Filed: December 20, 2001
    Publication date: July 10, 2003
    Inventors: William J. Koros, David Wallace, Stephen J. Miller, Claudia Staudt-Bickel, John Wind
  • Cigarette case
    Patent number: D292437
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: October 20, 1987
    Inventor: John Wind, III