Patents by Inventor Anthony C. Zwirgzdas

Anthony C. Zwirgzdas 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: 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
  • Patent number: 5145997
    Abstract: Poly (alkylene oxide) substituted acetoacetanilides of the formula: ##STR1## wherein B comprises a divalent bridging moiety selected from the group consisting of C.sub.1 -C.sub.6 alkylene, --NHSO.sub.2 --, --O--, --CO--, --COO--, and --NCHO--; X comprises a poly (alkylene oxide) having a number average molecular weight of about 200 to 10,000; R comprises 0 to 4 moieties independently selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy and halogen; and d is an integer of 1 to 3. The poly (alkylene oxide) substituted acetoacetanilides are prepared by reacting a poly (alkylene oxide) monoamine, diamine or triamine with isatoic anhydride followed by acetoacetylation of the resultant aminobenzamide. The substituted acetoacetanilides are useful for preparing improved diarylide pigment compositions which in turn are useful for preparing storage stable printing inks (especially of the publication gravure type).
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: September 8, 1992
    Assignee: Sun Chemical Corporation
    Inventors: Russell J. Schwartz, Anthony C. Zwirgzdas, Terence R. Chamberlain
  • Patent number: 5062894
    Abstract: Diarylide pigment compositions useful for preparing storage stable printing inks (especially of the publication gravure type) are prepared using a poly (alkylene oxide) substituted acetoacetanilide together with a typical acetoacetanilide and coupling the mixture of acetoacetanilides with tetrazotized dichlorobenzidine.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: November 5, 1991
    Assignee: Sun Chemical Corporation
    Inventors: Russell J. Schwartz, Anthony C. Zwirgzdas, Terence R. Chamberlain
  • 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