Patents by Inventor Manuel Z. Gregorio

Manuel Z. Gregorio 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).

  • Fluorescent orange azo pigments
    Patent number: 5904878
    Abstract: Orange azo fluorescent pigments and a process for a preparing same. Orange azo fluorescent pigments as a component of printing ink, coating, plastic compositions and articles of manufacture and used for controlling manufacturing operations.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: May 18, 1999
    Assignee: Sun Chemical Corporation
    Inventors: Paul A. Merchak, Russell J. Schwartz, Manuel Z. Gregorio
  • Fluorescent yellow azo pigments
    Patent number: 5863459
    Abstract: Yellow azo fluorescent pigments and a process for a preparing same. Yellow azo fluorescent pigments as a component of printing ink, coating, plastic compositions and articles of manufacture and used for controlling manufacturing operations.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: January 26, 1999
    Assignee: Sun Chemical Corporation
    Inventors: Paul A. Merchak, Russell J. Schwartz, Manuel Z. Gregorio, Anthony C. Zwirgzdas
  • Process for improving color value of a pigment
    Patent number: 5575843
    Abstract: A process for improving the color value of a pigment and for imparting stability to a water-based printing ink containing such pigment which comprises adding a polyester or polyether to the strike tank during the pigment conditioning step; the preferred polyether is methyl hydroxypropyl cellulose and the preferred polyester is benzoic acid-modified trimellitic anhydride polyester.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: November 19, 1996
    Assignee: Sun Chemical Corporation
    Inventors: Ramasamy Krishnan, Marilyn C. Yamat, Manuel Z. Gregorio, Russell J. Schwartz
  • Monoazo pigment compositions
    Patent number: 5024698
    Abstract: Monoazo pigments are provided which have improved properties achieved by incorporating certain azomethine compounds. The pigment compositions are prepared by reacting a primary amine-terminated alkylene oxide polymer and an acetoacetanilide to form an azomethine coupler and subsequently preparing the monoazo pigment composition by reacting the desired diazo component and coupling component in the presence of the azomethine coupler so as to form an azomethine composition of matter and the desired pigment.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: June 18, 1991
    Assignee: Sun Chemical Corporation
    Inventors: Russell J. Schwartz, Manuel Z. Gregorio
  • Water-based diarylide pigment compositions
    Patent number: 5021090
    Abstract: Water-based diarylide pigment compositions containing diarylide pigment modified with water-soluble amines. The pigment compositions are useful in both water-based coating and ink compositions.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: June 4, 1991
    Assignee: Sun Chemical Corporation
    Inventors: Russell J. Schwartz, Manuel Z. Gregorio
  • Disazo pyrazolone pigment compositions
    Patent number: 4946508
    Abstract: Disazo pyrazolone pigments are provided which have improved properties achieved by incorporating certain azomethine compounds. The pigment is prepared by reacting a primary amine terminated alkylene oxide polymer and acetoacetanilide or substituted acetoacetanilide to form an azomethine coupler, and subsequently co-reacting the azomethine coupler and a pyrazolone coupler with tetrazotized 3,3'-dichlorobenzidine or tetrazotized o-dianisidine. The pigment is useful in printing ink, plastics and paints.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: August 7, 1990
    Assignee: Sun Chemical Corporation
    Inventors: Russell J. Schwartz, Manuel Z. Gregorio
  • Diarylide pigment compositions
    Patent number: 4946509
    Abstract: Diarylide pigments modified with alkylene oxide polymers. The modified pigments are useful in both water-based and solvent-based coating and ink compositions.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: August 7, 1990
    Assignee: Sun Chemical Corporation
    Inventors: Russell J. Schwartz, Manuel Z. Gregorio, Anthony C. Zwirgzdas