Patents by Inventor Venkata Nekkanti

Venkata Nekkanti 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: 9868824
    Abstract: A method for formation of a semi-crystalline polyarylene sulfide is described. The method can include reaction of sulfur-containing monomer with a dihaloaromatic monomer in an organic amide solvent to form a polymer following by combination of the polymer with a crystallization solution. The crystallization solution is pre-heated and the mixture formed is slowly cooled to crystallize the polymer.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: January 16, 2018
    Assignee: Ticona LLC
    Inventors: Hendrich Chiong, Michael Haubs, Damian Feord, Stanley Leonard, Jacob Grayson, Venkata Nekkanti
  • Patent number: 9604156
    Abstract: Methods, devices, and systems that can be utilized in separating a polymer from other compounds of a polymer formation process are described. The methods utilize multiple sedimentors in a countercurrent flow design in conjunction with different solvent solutions in the multiple sedimentors to separate a product polymer from other compounds of a polymer formation process. The sedimentors include feed inlets that can encourage contact between countercurrent flows and improve mass transfer rates between the countercurrent flows.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: March 28, 2017
    Assignee: Ticona LLC
    Inventors: Venkata Nekkanti, Michael Haubs
  • Patent number: 9587074
    Abstract: A multi-stage process and system for formation of a polyarylene sulfide is described. The multi-stage process can include at least three separate formation stages that can take place in three different reactors. The first stage of the formation process can include reaction of an alkali metal sulfide with an organic amide solvent to form a complex including a hydrolysis product of the solvent and an alkali metal hydrogen sulfide. The second stage of the formation process can include reaction of the complex formed in the first stage with a dihaloaromatic monomer to form a prepolymer, and the third stage can include further polymerization of the prepolymer with additional monomers to form the final product.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: March 7, 2017
    Assignee: Ticona LLC
    Inventors: Hendrich Chiong, Michael Haubs, Damian Feord, Stanley Leonard, Jacob Grayson, Venkata Nekkanti
  • Publication number: 20160311978
    Abstract: A method for formation of a semi-crystalline polyarylene sulfide is described. The method can include reaction of sulfur-containing monomer with a dihaloaromatic monomer in an organic amide solvent to form a polymer following by combination of the polymer with a crystallization solution. The crystallization solution is pre-heated and the mixture formed is slowly cooled to crystallize the polymer.
    Type: Application
    Filed: July 6, 2016
    Publication date: October 27, 2016
    Inventors: Hendrich Chiong, Michael Haubs, Damian Feord, Stanley Leonard, Jacob Grayson, Venkata Nekkanti
  • Patent number: 9388283
    Abstract: A method for formation of a semi-crystalline polyarylene sulfide is described. The method can include reaction of sulfur-containing monomer with a dihaloaromatic monomer in an organic amide solvent to form a polymer following by combination of the polymer with a crystallization solution. The crystallization solution is pre-heated and the mixture formed is slowly cooled to crystallize the polymer.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: July 12, 2016
    Assignee: Ticona LLC
    Inventors: Hendrich Chiong, Michael Haubs, Damian Feord, Stanley Leonard, Jacob Grayson, Venkata Nekkanti
  • Publication number: 20150087805
    Abstract: Methods, devices, and systems that can be utilized in separating a polymer from other compounds of a polymer formation process are described. The methods utilize multiple sedimentors in a countercurrent flow design in conjunction with different solvent solutions in the multiple sedimentors to separate a product polymer from other compounds of a polymer formation process. The sedimentors include feed inlets that can encourage contact between countercurrent flows and improve mass transfer rates between the countercurrent flows.
    Type: Application
    Filed: September 9, 2014
    Publication date: March 26, 2015
    Inventors: Venkata Nekkanti, Michael Haubs
  • Publication number: 20150087776
    Abstract: A multi-stage process and system for formation of a polyarylene sulfide is described. The multi-stage process can include at least three separate formation stages that can take place in three different reactors. The first stage of the formation process can include reaction of an alkali metal sulfide with an organic amide solvent to form a complex including a hydrolysis product of the solvent and an alkali metal hydrogen sulfide. The second stage of the formation process can include reaction of the complex formed in the first stage with a dihaloaromatic monomer to form a prepolymer, and the third stage can include further polymerization of the prepolymer with additional monomers to form the final product.
    Type: Application
    Filed: September 9, 2014
    Publication date: March 26, 2015
    Inventors: Hendrich Chiong, Michael Haubs, Damian Feord, Stanley Leonard, Jacob Grayson, Venkata Nekkanti
  • Publication number: 20150087780
    Abstract: A method for formation of a semi-crystalline polyarylene sulfide is described. The method can include reaction of sulfur-containing monomer with a dihaloaromatic monomer in an organic amide solvent to form a polymer following by combination of the polymer with a crystallization solution. The crystallization solution is pre-heated and the mixture formed is slowly cooled to crystallize the polymer.
    Type: Application
    Filed: September 9, 2014
    Publication date: March 26, 2015
    Inventors: Hendrich Chiong, Michael Haubs, Damian Feord, Stanley Leonard, Jacob Grayson, Venkata Nekkanti