Patents by Inventor Hieu D. Phan

Hieu D. Phan 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).

  • Ink and coating compositions containing a blend of water-dispersible polyester and hydantoin-formaldehyde resins
    Patent number: 5274025
    Abstract: This invention relates to a polymer blend comprising water-dissipatable, sulfonate containing, a hydantoin-formaldehyde resin.
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: December 28, 1993
    Assignee: Eastman Kodak Company
    Inventors: Rebecca R. Stockl, Hieu D. Phan, Gary T. Clark
  • Ink millbase and method for preparation thereof
    Patent number: 5162399
    Abstract: Disclosed is a process for preparing ink millbase by use of a polymer blend of compatible polyesters and acrylic polymers. The polyesters are water-dispersible as a result of sulfonate groups on the polyester backbone. Use of the polymer blend results in an improvement in pigment particle size reduction during grinding.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: November 10, 1992
    Assignee: Eastman Kodak Company
    Inventors: Mahendra K. Sharma, Hieu D. Phan
  • Aqueous printing inks having improved freeze-thaw properties
    Patent number: 5129947
    Abstract: Disclosed are ink compositions having improved freeze-thaw properties that contain an effective amount of propylene glycol, for example, 0.5 to 10 weight percent. The inks also contain a water-dissipatable polyester prepared from certain amounts of isophthalic acid, 5-sodiosulfoisophthalic acid, cyclohexanedimethanol, and diethylene glycol.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: July 14, 1992
    Assignee: Eastman Kodak Company
    Inventors: Mahendra K. Sharma, Hieu D. Phan
  • Ink composition containing a blend of a polyester, an acrylic polymer and a vinyl polymer
    Patent number: 5075364
    Abstract: Disclosed is a novel blend of a water-dissipatable polyester material, an acrylic polymer and a water-dissipatable vinyl polymer. The acrylic polymer and the vinyl polymer must be compatible with the polyester. The polyester is exemplified in having an acid component of from about 75 to about 84 mole % isophthalic acid and conversely from about 25 to about 16 mole % 5-sodiosulfoisophthalic acid, and having a glycol component of from about 45 to about 60 mole % diethylene glycol and conversely from about 55 to about 44 mole % 1,4-cyclohexanedimethanol or ethylene glycol or mixtures thereof.The polymer blends are useful for preparing ink compositions having improved block resistance, water resistance, and alcohol resistance.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: December 24, 1991
    Assignee: Eastman Kodak Company
    Inventors: Hieu D. Phan, Gary T. Clark
  • Ink composition containing a blend of a polyester and an acrylic polymer
    Patent number: 5039339
    Abstract: Disclosed is a novel blend of a water-dissipatable polyester material and an acrylic polymer. The acrylic polymer must be compatible with the polyester and can be optionally styrenated. The polyester is exemplified in having an acid component of from about 75 to about 84 mole % isophthalic acid and conversely from about 25 to about 16 mole % 5-soldiosulfoisophthalic acid, and having a glycol component of from about 45 to about 60 mole % diethylene glycol and conversely from about 55 to about 44 mole % 1,4-cyclohexanedimethanol or ethylene glycol or mixtures thereof.The polymer blends are useful for preparing ink compositions having improved block resistance and water resistance.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: August 13, 1991
    Assignee: Eastman Kodak Company
    Inventors: Hieu D. Phan, Gary W. Carrier, Rebecca R. Stockl, Frank J. Tortorici, R. Gary Wulf
  • Ink composition containing a blend of a polyester and an acrylic polymer
    Patent number: 4996252
    Abstract: Disclosed is a novel blend of a water-dissipatable polyester material and an acrylic polymer. The acrylic polymer must be compatible with the polyester and can be optionally styrenated. The polyester is exemplified in having an acid component of from about 70 to about 84 mole % isophthalic acid and conversely from about 25 to about 16 mole % 5-sodiosulfoisophthalic acid, and having a glycol component of from about 45 to about 60 mole % diethylene glycol and conversely from about 55 to about 40 mole % 1,4-cyclohexanedimethanol or ethylene glycol or mixtures thereof.The polymer blends are useful for preparing ink compositions having improved block resistance and water resistance.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: February 26, 1991
    Assignee: Eastman Kodak Company
    Inventors: Hieu D. Phan, Gary W. Carrier, Rebecca R. Stockl, Frank J. Tortorici, R. Gary Wulf
  • Ink composition containing a blend of a polyester, an acrylic polymer and a vinyl polymer
    Patent number: 4921899
    Abstract: Disclosed is a novel blend of a water-dissipatable polyester material, an acrylic polymer and a water-dissipatable vinyl polymer. The acrylic polymer and the vinyl polymer must be compatible with the polyester. The polyester is exemplified in having an acid component of from about 75 to about 84 mole % isophthalic acid and conversely from about 25 to about 16 mole % 5-sodiosulfoisophthalic acid, and having a glycol component of from about 45 to about 60 mole % diethylene glycol and conversely from about 55 to about 44 mole % 1,4-cyclohexanedimethanol or ethylene glycol or mixtures thereof.The polymer blends are useful for preparing ink compositions having improved block resistance, water resistance, and alcohol resistance.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: May 1, 1990
    Assignee: Eastman Kodak Company
    Inventors: Hieu D. Phan, Gary T. Clark