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).

  • TREATED KRAFT PULP COMPOSITIONS AND METHODS OF MAKING THE SAME
    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
  • Fibrillated blend of lyocell and cellulosic low DP pulp
    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
  • Lyocell fibers
    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
  • Lyocell web product
    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
  • FIBRILLATED BLEND OF LYOCELL AND CELLULOSIC LOW DP PULP
    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
  • Nonwoven lyocell fiber webs for filtration
    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
  • Method for making lyocell web product
    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
  • Lyocell nonwoven webs
    Patent number: 8012565
    Abstract: Absorbent structures with nonwoven meltblown lyocell fiber webs are described which have excellent liquid distribution properties. The absorbent structures comprise at least two nonwoven meltblown lyocell fiber webs with superabsorbent polymer intermediate the two webs. Methods for making the structures are also described. The structures are particularly useful for use in disposable hygienic products.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: September 6, 2011
    Assignee: Weyerhaeuser NR Company
    Inventor: Mengkui Luo
  • FIBRILLATED BLEND OF LYOCELL LOW DP PULP
    Publication number: 20100288456
    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: May 14, 2009
    Publication date: November 18, 2010
    Applicant: WEYERHAEUSER NR COMPANY
    Inventors: John A. Westland, Andrew J. Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
  • Dissolution of cellulose in mixed solvent systems
    Patent number: 7828936
    Abstract: A method for dissolving cellulose in which the cellulose based raw material is admixed with a mixture of a dipolar aprotic intercrystalline swelling agent and an ionic liquid at a temperature of 25° C. to 180° C. for a time sufficient to dissolve the cellulose based raw material. The molar ratio of dipolar aprotic intercrystalline swelling agent to ionic liquid is 0.05 to 1.5 moles of dipolar aprotic intercrystalline swelling agent to 1 mole of ionic liquid. Dipolar aprotic intercrystalline swelling agents do not include imidazole based agents or amine based agents.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: November 9, 2010
    Assignee: Weyerhaeuser NR Company
    Inventors: Mengkui Luo, Amar N Neogi, Hugh West
  • Superabsorbent particles containing carboxyalkyl cellulose and temporary metal crosslinks
    Patent number: 7785710
    Abstract: Particles comprising a combination of a carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer, wherein the particles comprise a plurality of non-permanent metal crosslinks.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: August 31, 2010
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Mengkui Luo, Alena Michalek
  • Lyocell Web Product
    Publication number: 20100167029
    Abstract: A web comprising a layer of airlaid pulp or synthetic material overlaying and fastened to at least one layer of regenerated cellulose fiber. The airlaid fluff or synthetic material can be sandwiched between two regenerated cellulose fiber layers. The regenerated cellulose can be viscose or lyocell.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Applicant: WEYERHAEUSER COMPANY
    Inventor: MENGKUI LUO
  • Method for Making Lyocell Web Product
    Publication number: 20100162541
    Abstract: A method of making a web comprising a layer of airlaid pulp or synthetic material overlaying and fastened to at least one layer of regenerated cellulose fiber. The method can also provide a product in which the airlaid pulp or synthetic material can be sandwiched between two regenerated cellulose fiber layers. The regenerated cellulose can be viscose or lyocell.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Applicant: WEYERHAEUSER COMPANY
    Inventor: MENGKUI LUO
  • Lyocell Web Product
    Publication number: 20100167018
    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: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Applicant: WEYERHAEUSER COMPANY
    Inventors: MENGKUI LUO, DAVID George UNRAU
  • Method for Making Lyocell Web Product
    Publication number: 20100162542
    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: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Applicant: WEYERHAEUSER COMPANY
    Inventors: Mengkui Luo, David George Unrau
  • Methods for the preparation of superabsorbent particles containing carboxyalkyl cellulose
    Patent number: 7645806
    Abstract: A method for making particles containing carboxyalkyl cellulose, comprising blending a carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer in water to provide an aqueous solution; treating the aqueous solution with a crosslinking agent to provide a gel; drying the gel to provide a solid; comminuting the solid to provide a plurality of particles.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: January 12, 2010
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Mengkui Luo, Alena Michalek
  • Nonwoven lyocell fiber webs for filtration
    Publication number: 20090324926
    Abstract: Cellulose filtration products comprising nonwoven meltblown 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: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Applicant: Weyerhaeuser Co.
    Inventor: Mengkui Luo
  • Crosslinked carboxyalkyl cellulose fibers having permanent and non-permanent crosslinks
    Patent number: 7608167
    Abstract: Substantially water-insoluble, water-swellable, non-regenerated, carboxyalkyl cellulose fibers, wherein the fibers have a surface having the appearance of the surface of a cellulose fiber, and wherein the fibers include a plurality of non-permanent intra-fiber metal crosslinks and a plurality of permanent intra-fiber crosslinks; and fiber bundles that include the fibers.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: October 27, 2009
    Assignee: Weyerhaeuser NR Company
    Inventors: Mengkui Luo, S. Ananda Weerawarna, Jian Qin, James H Wiley
  • Methods for the preparation of crosslinked carboxyalkyl cellulose fibers having permanent and non-permanent crosslinks
    Patent number: 7604714
    Abstract: Methods for making substantially water-insoluble, water-swellable, non-regenerated, carboxyalkyl cellulose fibers, wherein the fibers have a surface having the appearance of the surface of a cellulose fiber, and wherein the fibers include a plurality of non-permanent intra-fiber metal crosslinks and a plurality of permanent intra-fiber crosslinks.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: October 20, 2009
    Assignee: Weyerhaeuser NR Company
    Inventors: Mengkui Luo, S. Ananda Weerawarna, Jian Qin, James H Wiley
  • Lyocell Nonwoven Webs
    Publication number: 20090246447
    Abstract: Absorbent structures with nonwoven meltblown lyocell fiber webs are described which have excellent liquid distribution properties. The absorbent structures comprise at least two nonwoven meltblown lyocell fiber webs with superabsorbent polymer intermediate the two webs. Methods for making the structures are also described. The structures are particularly useful for use in disposable hygienic products.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 1, 2009
    Applicant: Weyerhaeuser Co.
    Inventor: Mengkui Luo