Patents by Inventor Mengkui Luo

Mengkui Luo 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).

  • Publication number: 20200040525
    Abstract: Pulps, cellulose ether products, and methods of making pulps are described.
    Type: Application
    Filed: August 16, 2018
    Publication date: February 6, 2020
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: Mengkui Luo, Michael Rea, Angela Dodd, Andrew Dodd, Amy Anderson-Gaber, Kris Lindenauer, Hugh West, Charles Miller
  • Publication number: 20200002891
    Abstract: A pulp in accordance with a particular embodiment includes crosslinked cellulose fibers. The pulp can have high brightness, reactivity, and intrinsic viscosity. The pulp, therefore, can be well suited for use as a precursor in the production of low-color, high-viscosity cellulose derivatives. A method in accordance with a particular embodiment of the present technology includes forming a pulp from a cellulosic feedstock, bleaching the pulp, crosslinking cellulose fibers within the pulp while the pulp has a high consistency, and drying the pulp. The bleaching process can reduce a lignin content of the pulp to less than or equal to 0.09% by oven-dried weight of the crosslinked cellulose fibers. Crosslinking the cellulose fibers can include exposing the cellulose fibers to a glycidyl ether crosslinker having two or more glycidyl groups and a molecular weight per epoxide within a range from 140 to 175.
    Type: Application
    Filed: September 13, 2019
    Publication date: January 2, 2020
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventor: Mengkui Luo
  • Patent number: 10428459
    Abstract: A pulp in accordance with a particular embodiment includes crosslinked cellulose fibers. The pulp can have high brightness, reactivity, and intrinsic viscosity. The pulp, therefore, can be well suited for use as a precursor in the production of low-color, high-viscosity cellulose derivatives. A method in accordance with a particular embodiment of the present technology includes forming a pulp from a cellulosic feedstock, bleaching the pulp, crosslinking cellulose fibers within the pulp while the pulp has a high consistency, and drying the pulp. The bleaching process can reduce a lignin content of the pulp to less than or equal to 0.09% by oven-dried weight of the crosslinked cellulose fibers. Crosslinking the cellulose fibers can include exposing the cellulose fibers to a glycidyl ether crosslinker having two or more glycidyl groups and a molecular weight per epoxide within a range from 140 to 175.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: October 1, 2019
    Assignee: INTERNATIONAL PAPER COMPANY
    Inventor: Mengkui Luo
  • Publication number: 20190242060
    Abstract: Compositions including treated Kraft pulp, useful for making rayon fibers, having a lower degree of polymerization, a high R18, a low hemicellulose content, and high reactivity, are described. Methods of making the compositions are also described.
    Type: Application
    Filed: December 28, 2018
    Publication date: August 8, 2019
    Inventors: Mengkui Luo, Venketa Ranganathan Parthasarathy
  • Publication number: 20180363245
    Abstract: Pulps in accordance with certain embodiments include crosslinked cellulose fibers and have high brightness, reactivity, and intrinsic viscosity, and therefore can be well suited for use as a precursor in the production of low-color, high-viscosity cellulose derivatives. A method in accordance with the present technology includes forming a pulp from a cellulosic feedstock, bleaching the pulp, crosslinking cellulose fibers within the pulp while the pulp has a high consistency, and drying the pulp. Crosslinking the cellulose fibers can include exposing the fibers to a glycidyl ether crosslinker having two or more glycidyl groups and a molecular weight per epoxide within a range from 140 to 175. Another method in accordance with the present technology includes providing an aqueous suspension of pulp that includes chemical wood pulp fibers that were previously bleached and dried, crosslinking the fibers with such a glycidal ether crosslinker, and drying the pulp.
    Type: Application
    Filed: August 24, 2018
    Publication date: December 20, 2018
    Applicant: International Paper Company
    Inventor: Mengkui Luo
  • Publication number: 20180187372
    Abstract: A pulp in accordance with a particular embodiment includes crosslinked cellulose fibers. The pulp can have high brightness, reactivity, and intrinsic viscosity. The pulp, therefore, can be well suited for use as a precursor in the production of low-color, high-viscosity cellulose derivatives. A method in accordance with a particular embodiment of the present technology includes forming a pulp from a cellulosic feedstock, bleaching the pulp, crosslinking cellulose fibers within the pulp while the pulp has a high consistency, and drying the pulp. The bleaching process can reduce a lignin content of the pulp to less than or equal to 0.09% by oven-dried weight of the crosslinked cellulose fibers. Crosslinking the cellulose fibers can include exposing the cellulose fibers to a glycidyl ether crosslinker having two or more glycidyl groups and a molecular weight per epoxide within a range from 140 to 175.
    Type: Application
    Filed: March 1, 2018
    Publication date: July 5, 2018
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventor: Mengkui Luo
  • Publication number: 20180105985
    Abstract: A fibrillated blend of lyocell and cellulosic pulp having a degree of polymerization of 200 to 1000 as measured by ASTM Test 1975-96, a method of making the blend and materials which incorporate the blend.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 19, 2018
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: John A. Westland, Andrew J. Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
  • Patent number: 9926665
    Abstract: A pulp in accordance with a particular embodiment includes crosslinked cellulose fibers. The pulp can have high brightness, reactivity, and intrinsic viscosity. The pulp, therefore, can be well suited for use as a precursor in the production of low-color, high-viscosity cellulose derivatives. A method in accordance with a particular embodiment of the present technology includes forming a pulp from a cellulosic feedstock, bleaching the pulp, crosslinking cellulose fibers within the pulp while the pulp has a high consistency, and drying the pulp. The bleaching process can reduce a lignin content of the pulp to less than or equal to 0.09% by oven-dried weight of the crosslinked cellulose fibers. Crosslinking the cellulose fibers can include exposing the cellulose fibers to a glycidyl ether crosslinker having two or more glycidyl groups and a molecular weight per epoxide within a range from 140 to 175.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: March 27, 2018
    Assignee: INTERNATIONAL PAPER COMPANY
    Inventor: Mengkui Luo
  • Patent number: 9845575
    Abstract: A fibrillated blend of lyocell and cellulosic pulp having a degree of polymerization of 200 to 1000 as measured by ASTM Test 1795-96, a method of making the blend and materials which incorporate the blend.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: December 19, 2017
    Assignee: INTERNATIONAL PAPER COMPANY
    Inventors: John A. Westland, Andrew J Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
  • Patent number: 9708760
    Abstract: Esterified cellulose pulp compositions produced in high yield from commercially available wood pulp sources, methods for making the esterified cellulose pulp compositions, and articles prepared from the esterified cellulose pulp compositions.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: July 18, 2017
    Assignee: INTERNATIONAL PAPER COMPANY
    Inventors: Mengkui Luo, Angela Dodd, Hugh West, Amar Neogi, Karen D. Brogan
  • Publication number: 20150376835
    Abstract: Esterified cellulose pulp compositions produced in high yield from commercially available wood pulp sources, methods for making the esterified cellulose pulp compositions, and articles prepared from the esterified cellulose pulp compositions.
    Type: Application
    Filed: June 30, 2014
    Publication date: December 31, 2015
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Mengkui Luo, Angela Dodd, Hugh West, Amar Neogi, Karen D. Brogan
  • Publication number: 20150376836
    Abstract: Esterified cellulose pulp compositions produced in high yield from commercially available wood pulp sources, methods for making the esterified cellulose pulp compositions, and articles prepared from the esterified cellulose pulp compositions.
    Type: Application
    Filed: June 30, 2014
    Publication date: December 31, 2015
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Mengkui Luo, Angela Dodd, Hugh West, Amar Neogi, Karen D. Brogan
  • Patent number: 9222223
    Abstract: Esterified cellulose pulp compositions produced in high yield from commercially available wood pulp sources, methods for making the esterified cellulose pulp compositions, and articles prepared from the esterified cellulose pulp compositions.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: December 29, 2015
    Assignee: Weyerhaeuser NR Company
    Inventors: Mengkui Luo, Angela Dodd, Hugh West, Amar Neogi, Karen D. Brogan
  • Publication number: 20150184338
    Abstract: Compositions including treated Kraft pulp, useful for making rayon fibers, having a lower degree of polymerization, a high R18, a low hemicellulose content, and high reactivity, are described. Methods of making the compositions are also described.
    Type: Application
    Filed: December 31, 2013
    Publication date: July 2, 2015
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: Mengkui Luo, Venketa Ranganathan Parthasarathy
  • Patent number: 8894812
    Abstract: A fibrillated blend of lyocell and cellulosic pulp having a degree of polymerization of 200 to 1000 as measured by ASTM Test 1975-96, a method of making the blend and materials which incorporate the blend.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: November 25, 2014
    Assignee: Weyerhaeuser NR Company
    Inventors: John A. Westland, Andrew J. Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
  • Patent number: 8802229
    Abstract: Meltblown lyocell fibers incorporating polyolefinic hydrophobic polymers are disclosed. The polymer is distributed fairly uniformly within the fiber and exists as approximately one to two micron diameter domains. The fibers have a high hemicellulose level, show reduced water retention values and have varying diameters depending on processing conditions. The fibers have a brightness of at least 60.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: August 12, 2014
    Assignee: Weyerhaeuser NR Company
    Inventor: Mengkui Luo
  • Patent number: 8318318
    Abstract: A web comprising a layer of crosslinked cellulosic fiber overlaid on and integral with at least one layer of regenerated cellulose fiber. The crosslinked cellulosic fiber can be sandwiched between two regenerated cellulose fiber layers. The regenerated cellulose can be viscose or lyocell.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: November 27, 2012
    Assignee: Weyerhaeuser NR Company
    Inventors: Mengkui Luo, David George Unrau
  • Publication number: 20120285640
    Abstract: A fibrillated blend of lyocell and cellulosic pulp having a degree of polymerization of 200 to 1000 as measured by ASTM Test 1975-96, a method of making the blend and materials which incorporate the blend.
    Type: Application
    Filed: July 20, 2012
    Publication date: November 15, 2012
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: John A. Westland, Andrew J. Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
  • Patent number: 8263506
    Abstract: Cellulose filtration products comprising nonwoven lyocell fiber webs in which the fibers have a diameter of from 3 to 12 microns, the largest pore diameter of less than about 300 microns and a mean flow pore diameter of less than about 150 microns are disclosed. Multilayer nonwoven lyocell fiber webs are also disclosed which have lower mean flow pore diameters and lower pore sizes.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: September 11, 2012
    Assignee: Weyerhaeuser NR Company
    Inventor: Mengkui Luo
  • Patent number: 8191214
    Abstract: A method for making a web comprising a layer of crosslinked cellulosic fiber overlaid on and fastened to at least one layer of regenerated cellulose fiber. In one method the crosslinked cellulosic fiber is be sandwiched between two regenerated cellulose fiber layers. The regenerated cellulose can be viscose or lyocell or be made from several solvents.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: June 5, 2012
    Assignee: Weyerhaeuser NR Company
    Inventors: Mengkui Luo, David George Unrau