Patents by Inventor Tuyen T. Nguyen

Tuyen T. Nguyen 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: 6355855
    Abstract: Process for the oligomerization of 1-alkenes to internal alkenes and a catalyst therefor. 1-Alkene is combined, in liquid phase and at a temperature of from about 50 to about 200° C., with a catalyst formed by contacting at least one Group VIII transition metal salt with at least one alkylaluminum compound. If the at least one Group VIII transition metal salt includes cobalt and the at least one alkylaluminum compound includes trialkylaluminum compound the process is carried out in the substantial absence of alkoxyaluminum species.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: March 12, 2002
    Assignee: Hercules Incorporated
    Inventors: Tuyen T. Nguyen, Brenda A. Lloyd
  • Patent number: 6277925
    Abstract: Curable polymer compositions comprising a crosslinkable polymeric component; an initiator component; and an allyl compound component.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: August 21, 2001
    Assignees: Hercules Incorporated, Plastics Technology Corporation
    Inventors: Atanu Biswas, Paul Joseph Caronia, John Salvatore Furno, Laurence Herbert Gross, Michael John Keogh, Frederick F. Nelson, Tuyen T. Nguyen
  • Patent number: 6146497
    Abstract: Additives for addition to starting materials in cellulose based products for imparting strength and crepe. Additives for use in paper production which impart strength to the product and which can be used in creping adhesives. Enzyme activated resins for use in paper production. Enzyme-activated adhesives for use in paper production. Paper products comprising the aforementioned additives or resins. Methods for imparting strength or crepe to paper products.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: November 14, 2000
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen
  • Patent number: 6143822
    Abstract: A composition comprising:(a) polyethylene;(b) as a scorch inhibitor, 1,1-diphenylethylene, substituted or unsubstituted;(c) optionally, a cure booster; and(d) an organic peroxide.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: November 7, 2000
    Assignees: Union Carbide Chemicals & Plastics Technology Corporation, Hercules Incorporated
    Inventors: Paul Joseph Caronia, Michael John Keogh, John Salvatore Furno, Laurence Herbert Gross, Frederick F. Nelson, Tuyen T. Nguyen, Atanu Biswas
  • Patent number: 5690961
    Abstract: Acidic polysaccharides crosslinked by reaction with di- or polyanhydrides. The use of anhydride-crosslinked hyaluronic acid as a treatment for arthritis, as a drug delivery vehicle, to reduce the incidence of post-operative adhesion formation, to promote the healing of chronic wounds and ulcers, and as a component of cosmetic formulations.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: November 25, 1997
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen
  • Patent number: 5612321
    Abstract: Grafted polysaccharide compositions comprising polysaccharides grafted with antioxidants on at least one hydroxyl group of the polysaccharide. The use of antioxidant grafted polysaccharides or antioxidant grafted crosslinked polysaccharides as a treatment for arthritis, as a drug delivery vehicle, to reduce the incidence of post-operative adhesion formation, to promote the healing of chronic wounds and ulcers, and as a component of cosmetic formulations.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: March 18, 1997
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen
  • Patent number: 5112924
    Abstract: Described are novel thermosetting maleimide compositions suitable for making cured resins, prepregs and tough thermoset composites. The thermosetting compositions comprise a multifunctional maleimide and a terminally unsaturated polyamide, polyimide, or polyamideimide oligomer which is soluble in the composition. The cured resins have a fracture toughness, K.sub.IC, of at least 1.0 MPam 1/2 and a glass transition temperature of at least 200.degree. C.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: May 12, 1992
    Assignee: Hercules Incorporated
    Inventors: Sung G. Chu, Harold Jabloner, Tuyen T. Nguyen
  • Patent number: 5096766
    Abstract: Described are novel thermosetting maleimide compositions suitable for making cured resins, prepregs and tough thermoset composites. The thermosetting compositions comprise a multifunctional maleimide and a terminally unsaturated polyamide, polyimide, or polyamideimide oligomer which is soluble in the composition. The cured resins have a fracture toughness, K.sub.IC, of at least 1.0 MPan.sup.1/2 and a glass transition temperature of at least 200.degree. C.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: March 17, 1992
    Assignee: Hercules Incorporated
    Inventors: Sung G. Chu, Harold Jabloner, Tuyen T. Nguyen
  • Patent number: 5095074
    Abstract: A novel polyfunctional maleimide-based thermosettable resin composition comprising: (a) at least one polyfunctional maleimide compound selected from the group consisting of bismaleimide and polymaleimide, and (b) at least one ether derivative of an alkenylphenol.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: March 10, 1992
    Assignee: Hercules Incorporated
    Inventors: Sung G. Chu, Harold Jabloner, Tuyen T. Nguyen
  • Patent number: 4962161
    Abstract: A novel polyfunctional maleimide-based thermosettable resin composition comprising: (a) at least one polyfunctional maleimide compound selected from the group consisting of bismaleimide and polymaleimide, and (b) at least one ether derivative of an alkenylphenol.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: October 9, 1990
    Assignee: Hercules Incorporated
    Inventors: Sung G. Chu, Harold Jabloner, Tuyen T. Nguyen
  • Patent number: 4946908
    Abstract: Described are novel thermosetting maleimide compositions suitable for making cured resins, prepregs and tough thermoset composites. The thermosetting compositions comprise a multifunctional maleimide and terminally unsaturated polyamide, polyimide, or polyamideimide oligomer which is soluble in the composition. The cured resins have a fracture toughness, K.sub.ic, of at least 1.0 MPam.sup.1/2 and a glass transition temperature of at least 200.degree. C.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: August 7, 1990
    Assignee: Hercules Incorporated
    Inventors: Sung G. Chu, Harold Jabloner, Tuyen T. Nguyen
  • Patent number: 4853442
    Abstract: Novel sulfur containing polyarylene polyether oligomers are disclosed. The oligomers are prepared through condensing salts of hydroxy and/or thio aromatic compounds, halobenzenoid compounds bearing two replaceable halogens and metal or ammonium sulfides following by end capping the resultant oligomer intermediate with a salt of a hydroxy and/or thio aromatic compound.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: August 1, 1989
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen
  • Patent number: 4808364
    Abstract: A method of forming rotationally molded articles without providing significant heating, the method including: (a) providing a liquid monomer solution, and rotational molding means, the molding means having an inner chamber wall defining an inner chamber, the liquid monomer solution including catalyst and monomer; (b) conveying the liquid solution into the rotational molding means; (c) rotating the rotational molding means; (d) continuing the rotation while the solution polymerizes to form an article of polymer.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: February 28, 1989
    Assignee: Hercules Incorporated
    Inventors: Harry W. Blunt, Tuyen T. Nguyen
  • Patent number: 4808635
    Abstract: Disclosed is a method of making a cross-linked poly(dicyclopentadiene) with a metathesis-catalyst system, where the metathesis-catalyst system contains an organoaluminum or organoaluminum halide activator and a pentavalent tantalum catalyst. In a preferred embodiment, the cross-linked polymer is formed by combining, in a first place, a plurality of reactant streams, one reactant stream which contains the activator, a second reactant stream which contains the catalyst and at least one reactant stream which contains dicyclopentadiene; then injecting the combined reactant streams into a second place, such as a mold, where polymerization occurs. Use of the pentavalent tantalum catalyst results in the formation of a cross-linked polymer having less color and greater transparency than cross-linked poly(dicyclopentadiene) made without a pentavalent tantalum catalyst.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: February 28, 1989
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen
  • Patent number: 4789722
    Abstract: Polyarylene polyethers, made by a process comprising reacting a dihydroxy compound and strong and weak bases in a liquid reaction medium at 100.degree.-200.degree. C. to form a double salt and then reacting the double salt with a slight molar excess of dihalobenzenoid compound bearing two replaceable halogens, are disclosed. The process reliably produces halogen-terminated polyarylene polyethers of select degrees of polymerization and desirable correspondence between weight and number average molecular weights. In subsequent steps amine-terminated polyarylene polyethers are made using the strong and weak bases. The resulting amine-terminated polyethers have a low, select degree of polymerization, desirable correspondence between weight and number average molecular weights and high level of amine termination.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: December 6, 1988
    Assignee: Hercules Incorporated
    Inventors: Harold Jabloner, Tuyen T. Nguyen
  • Patent number: 4703068
    Abstract: Disclosed is a method of making a cross-linked poly(dicyclopentadiene) with a metathesis-catalyst system, where the metathesis-catalyst system contains an organoaluminum or organoaluminum halide activator and a pentavalent tantalum catalyst. In a preferred embodiment, the cross-linked polymer is formed by combining, in a first place, a plurality of reactant streams, one reactant stream which contains the activator, a second reactant stream which contains the catalyst and at least one reactant stream which contains dicyclopentadiene; then injecting the combined reactant streams into a second place, such as a mold, where polymerization occurs. Use of the pentavalent tantalum catalyst results in the formation of a cross-linked polymer having less color and greater transparency than cross-linked poly(dicyclopentadiene) made without a pentavalent tantalum catalyst.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: October 27, 1987
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen