Patents by Inventor Willie Lau

Willie Lau 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: 6300409
    Abstract: Polymer compositions which are useful to improve water repellency and durability in fiber, nonwoven, textile, and paper compositions are disclosed. A method of improving water repellency and durability in fiber, nonwoven, textile, and paper compositions is also disclosed.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: October 9, 2001
    Assignee: Rohm and Haas Company
    Inventors: Willie Lau, Maureen Joanne Finley, Martin Marion Williams, Hal Conley Morris
  • Patent number: 6271898
    Abstract: Disclosed are uniformly sized domains of liquid crystals, a method for forming the domains, and their performance in polymer dispersed liquid crystal displays. The method provides the ability to form discrete domains of liquid crystal surrounded by a polymer shell, also known as polymer encased liquid crystals, or PELCs. Further, the method provides for the ability to make PELCs that have uniformly sized particles. Displays made comprising uniformly sized PELCs demonstrate markedly improved electro-optical performance over displays made by conventional polymer dispersed liquid crystal processes.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: August 7, 2001
    Assignee: Rohm and Haas Company
    Inventors: Richard Roy Clikeman, Morris Christopher Wills, Peter Reeves Sperry, Martin Vogel, Jiun-Chen Wu, Willie Lau
  • Publication number: 20010005734
    Abstract: Polymer compositions which are useful to improve water repellency and durability in fiber, nonwoven, textile, and paper compositions are disclosed. A method of improving water repellency and durability in fiber, nonwoven, textile, and paper compositions is also disclosed.
    Type: Application
    Filed: February 5, 2001
    Publication date: June 28, 2001
    Inventors: Willie Lau, Maureen Joanne Finley, Martin Marion Williams, Hal Conley Morris
  • Patent number: 6225242
    Abstract: Polymer compositions which are useful to improve water repellency and durability in fiber, nonwoven, textile, and paper compositions are disclosed. A method of improving water repellency and durability in fiber, nonwoven, textile, and paper compositions is also disclosed.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: May 1, 2001
    Assignee: Rohm and Haas Company
    Inventors: Willie Lau, Maureen Joanne Finley, Martin Marion Williams, Hal Conley Morris
  • Patent number: 6218464
    Abstract: Disclosed is a method for preparing fluorinated emulsion polymers that reduces or eliminates the need for fluorinated surfactants comprising the steps of: a) providing a reaction mixture comprising water, surfactant, monomer mixture comprising at least one fluorinated monomer, at least one non-fluorinated monomer having high water solubility, and optionally at least one non-fluorinated monomer having low water solubility, macromolecular organic compound having a hydrophobic cavity; and b) polymerizing said monomer mixture.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: April 17, 2001
    Assignee: Rohm and Haas Company
    Inventors: Hsing-Yeh Parker, Willie Lau, Erik S. Rosenlind
  • Patent number: 6191244
    Abstract: Polymer compositions which are useful to improve water repellency and durability in fiber, nonwoven, textile, and paper compositions are disclosed. A method of improving water repellency and durability in fiber, nonwoven, textile, and paper compositions is also disclosed.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: February 20, 2001
    Assignee: ROHM And HAAS Company
    Inventors: Willie Lau, Maureen Joanne Finley, Martin Marion Williams, Hal Conley Morris
  • Patent number: 6117326
    Abstract: The present invention provides for the convenient preparation, purification, use and re-use of capillary electrochromatography columns that employ polymer gel materials as the separation media. The problems associated with employing crosslinked polymer gels is overcome through the use of physically entangled polymer gels, which comprise, as polymerized units: 1) 5% to 80% by weight of an ionizable monomer; 2) 0.1% to 50% by weight of a monomer containing a retentive ligand; and 3) 10% to 80% by weight of a nonionic monomer.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: September 12, 2000
    Assignee: Rohm and Haas Company
    Inventors: Mark Richard Schure, Willie Lau
  • Patent number: 6063857
    Abstract: Aqueous solutions of hydrophobically-modified alkali-soluble emulsion polymers which exhibit relatively low solution viscosity are disclosed. Such solutions are particularly useful for controlling the viscosity of aqueous systems to which the solutions are added.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: May 16, 2000
    Assignee: Rohm and Haas Company
    Inventors: Gary David Greenblatt, Willie Lau, Andrew Gordon Batzell, 3rd
  • Patent number: 6040409
    Abstract: Polymer compositions which are useful in floor polish compositions as wax replacements are disclosed. The compositions provide improved repair properties in floor polishes and provide a non-slippery floor polish.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: March 21, 2000
    Assignee: Rohm and Haas Company
    Inventors: Willie Lau, Michael DeWayne Kelly, Dennis Paul Lorah, David Ralph Heinley
  • Patent number: 6037058
    Abstract: Disclosed are uniformly sized domains of liquid crystals, a method for forming the domains, and their performance in polymer dispersed liquid crystal displays. The method provides the ability to form discrete domains of liquid crystal surrounded by a polymer shell, also known as polymer encased liquid crystals, or PELCs. Further, the method provides for the ability to make PELCs that have uniformly sized particles. Displays made comprising uniformly sized PELCs demonstrate markedly improved electro-optical performance over displays made by conventional polymer dispersed liquid crystal processes.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: March 14, 2000
    Assignee: Rohms and Haas Company
    Inventors: Richard Roy Clikeman, Morris Christopher Wills, Peter Reeves Sperry, Martin Vogel, Jiun-Chen Wu, Willie Lau
  • Patent number: 5976405
    Abstract: Disclosed are uniformly sized domains of liquid crystals, a method for forming the domains, and their performance in polymer dispersed liquid crystal displays. The method provides the ability to form discrete domains of liquid crystal surrounded by a polymer shell, also known as polymer encased liquid crystals, or PELCs. Further, the method provides for the ability to make PELCs that have uniformly sized particles. Displays made comprising uniformly sized PELCs demonstrate markedly improved electro-optical performance over displays made by conventional polymer dispersed liquid crystal processes.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: November 2, 1999
    Assignee: Rohm and Haas Company
    Inventors: Richard Roy Clikeman, Morris Christopher Wills, Peter Reeves Sperry, Martin Vogel, Jiun-Chen Wu, Willie Lau
  • Patent number: 5969063
    Abstract: Disclosed is a method for preparing fluorinated emulsion polymers that reduces or eliminates the need for fluorinated surfactants comprising the steps of:a) providing a reaction mixture comprising water, surfactant, monomer mixture comprising at least one fluorinated monomer, at least one non-fluorinated monomer having high water solubility, and optionally at least one non-fluorinated monomer having low water solubility, macromolecular organic compound having a hydrophobic cavity; andb) polymerizing said monomer mixture.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: October 19, 1999
    Assignee: Rohm and Haas Company
    Inventors: Hsing-Yeh Parker, Willie Lau, Erik S. Rosenlind
  • Patent number: 5835174
    Abstract: Disclosed are uniformly sized domains of liquid crystals, a method for forming the domains, and their performance in polymer dispersed liquid crystal displays. The method provides the ability to form discrete domains of liquid crystal surrounded by a polymer shell, also known as polymer encased liquid crystals, or PELCs. Further, the method provides for the ability to make PELCs that have uniformly sized particles. Displays made comprising uniformly sized PELCs demonstrate markedly improved electro-optical performance over displays made by conventional polymer dispersed liquid crystal processes.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: November 10, 1998
    Assignee: Rohm and Haas Company
    Inventors: Richard Roy Clikeman, Morris Christopher Wills, Peter Reeves Sperry, Martin Vogel, Jiun-Chen Wu, Willie Lau
  • Patent number: 5760129
    Abstract: An aqueous polymerization method is disclosed for forming polymers containing, as polymerized units, at least one monomer having low water solubility, including the steps of:(1) complexing at least one monomer having low water solubility with a macromolecular organic compound having a hydrophobic cavity; and(2) polymerizing in an aqueous system from about 0.1% to about 100%, by weight of the monomer component, based on the total weight of the polymer, of the complexed monomer having low water solubility with from about 0% to about 99.9% by weight, based on the total weight of the polymer, of at least one monomer having high water solubility.The method is also useful for forming aqueous solution polymers having low water solubility.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: June 2, 1998
    Assignee: Rohm and Haas Company
    Inventor: Willie Lau
  • Patent number: 5710226
    Abstract: An aqueous polymerization method is disclosed for forming polymers containing, as polymerized units, at least one monomer having low water solubility, including the steps of:(1) complexing at least one monomer having low water solubility with a macromolecular organic compound having a hydrophobic cavity; and(2) polymerizing in an aqueous system from about 0.1% to about 100%, by weight of the monomer component, based on the total weight of the polymer, of the complexed monomer having low water solubility with from about 0% to about 99.9% by weight, based on the total weight of the polymer, of at least one monomer having high water solubility.The method is also useful for forming aqueous solution polymers having low water solubility.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: January 20, 1998
    Assignee: Rohm and Haas Company
    Inventor: Willie Lau
  • Patent number: 5521266
    Abstract: An aqueous polymerization method is disclosed for forming polymers containing, as polymerized units, at least one monomer having low water solubility, including the steps of:(1) complexing at least one monomer having low water solubility with a macromolecular organic compound having a hydrophobic cavity; and(2) polymerizing in an aqueous system from about 0.1% to about 100%, by weight of the monomer component, based on the total weight of the polymer, of the complexed monomer having low water solubility with from about 0% to about 99.9% by weight, based on the total weight of the polymer, of at least one monomer having high water solubility.The method is also useful for forming aqueous solution polymers having low water solubility.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: May 28, 1996
    Assignee: Rohm and Haas Company
    Inventor: Willie Lau
  • Patent number: 5376709
    Abstract: An improved method is provided for reversibly suppressing the viscosity of an aqueous solution containing a hydrophobically modified thickener by first complexing the hydrophobic moieties of the thickener with a methyl-.beta.-cyclodextrin and then decomplexing the methyl-.beta.-cyclodextrin from the thickener once the aqueous solution containing the thickener is added to the aqueous system which is intended to thicken.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: December 27, 1994
    Assignee: Rohm and Haas Company
    Inventors: Willie Lau, Vishnu M. Shah
  • Patent number: 5328972
    Abstract: A process for preparing polymers having molecular weights below 5,000 and polydispersity below 2.5 is provided. The polymerization is conducted in supercritical carbon dioxide at temperatures of at least 200.degree. C. and pressures above 3,500 psi. The process can be continuous, semi-continuous, or batch. The polymers are useful as detergent additives, scale inhibitors, dispersants and crystal growth modifiers.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: July 12, 1994
    Assignee: Rohm and Haas Company
    Inventors: Emmanuel A. Dada, Willie Lau, Richard F. Merritt, Yi H. Paik, Graham Swift
  • Patent number: 5310851
    Abstract: A hydrophobically-modified thickener having at least one hydrophilic portion and at least two terminal hydrophobic portions wherein at least one of the hydrophobic portions contains a stable free radical and its preparation are disclosed. The presence of the stable free radical permits analysis by spin-labelling analytical techniques, such as, for example, electron spin resonance.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: May 10, 1994
    Assignee: Rohm & Haas
    Inventor: Willie Lau