Patents by Inventor J. Stewart Witzeman

J. Stewart Witzeman 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: 5667901
    Abstract: Provided are various 2-acetylglutarate esters of polyols which are useful as poller crosslinkers for use in thermosetting coating compositions, as well as methods of preparation of these materials. In particular, the invention provides crosslinkers of the formula ##STR1## wherein R and R' are independently t-butyl, t-amyl, or phenyl, and x is an integer of from 2 to 5.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: September 16, 1997
    Assignee: Eastman Chemical Company
    Inventors: Philip C. Heidt, Charles H. Foster, J. Stewart Witzeman
  • Patent number: 5466863
    Abstract: Provided are 3-oxoadipate esters of certain polyols which are useful as crosslinkers in thermosetting coating compositions. Also provided are such thermosetting compositions comprised of a curable hydroxyl-functional polymer such as a polyester or acrylic and the crosslinkers of the present invention. Such compositions offer a significant improvement in curing temperature.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: November 14, 1995
    Assignee: Eastman Chemical Company
    Inventors: Philip C. Heidt, Charles H. Foster, J. Stewart Witzeman, Allen L. Crain
  • Patent number: 5453464
    Abstract: This invention provides the use and preparation of certain 2,2'-diacetyl-bisacetoacetates and bis(beta-ketoesters). These compounds are useful in coating formulations as crosslinkers in conjunction with polyester, acrylic and/or other hydroxylated resins to provide coatings that cure at about 100.degree. and 175.degree. C. Certain combinations of these crosslinkers and resins cure at unusually low temperatures and provide films with good combinations of flexibility, hardness and adhesion.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: September 26, 1995
    Assignee: Eastman Chemical Company
    Inventors: J. Stewart Witzeman, Allen L. Crain
  • Patent number: 5412151
    Abstract: Provided are 3-oxoadipate esters of certain polyols which are useful as crosslinkers in thermosetting coating compositions. Also provided are such thermosetting compositions comprised of a curable hydroxyl-functional polymer such as a polyester or acrylic and the crosslinkers of the present invention. Such compositions offer a significant improvement in curing temperature.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: May 2, 1995
    Assignee: Eastman Chemical Company
    Inventors: Philip C. Heidt, Charles H. Foster, J. Stewart Witzeman, Allen L. Crain
  • Patent number: 5373048
    Abstract: Disclosed is a composition comprising(A) a polymer selected from the group consisting of(1) an amorphous, non-chlorinated, maleated polypropylene,(2) an amorphous, non-chlorinated, maleated propylene-ethylene copolymer,(3) an amorphous, non-chlorinated, maleated propylene-hexene copolymer,(4) an amorphous, non-chlorinated, maleated propylene-butene copolymer,(5) an amorphous, non-chlorinated, maleated propylene-ethylene-butene terpolymer, and(6) an amorphous, non-chlorinated, maleated propylene-ethylene-hexene terpolymer,(B) a nonionic surfactant,(C) a primary, secondary or tertiary amine, and(D) water.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: December 13, 1994
    Assignee: Eastman Chemical Company
    Inventors: J. Stewart Witzeman, Q. Leslie Scott, Paul J. Greene, Kevin A. Williams, Stephen L. Poteat
  • Patent number: 5359125
    Abstract: Disclosed are certain novel 2,2'-bisacetoacetates useful as crosslinking agents and a process for the preparation therefor. Also provided are novel enamel compositions containing the crosslinkers and coatings and articles coated with thermosetting coating compositions crosslinked with these novel crosslinkers.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: October 25, 1994
    Assignee: Eastman Chemical Company
    Inventors: J. Stewart Witzeman, Allen L. Crain
  • Patent number: 5288820
    Abstract: Disclosed are thermosetting or curable coating compositions comprising (1) a film forming polymeric material bearing acetoacetate residues, (2) an amino resin cross-linking or curing material, (3) an organic sulfonic acid cross-linking or curing catalyst, and (4) an epoxide compound selected from limonene monoepoxide, limonene diepoxide and a mixture thereof. The presence of the limonene epoxide inhibit discoloration of the coating composition upon prolonged storage, especially at elevated temperatures.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: February 22, 1994
    Assignee: Eastman Kodak Company
    Inventors: Franklin D. Rector, Jr., J. Stewart Witzeman
  • Patent number: 5254637
    Abstract: Disclosed are certain novel 2,2'-bisacetoacetates useful as crosslinking agents and a process for the preparation therefor. Also provided are novel enamel compositions containing the crosslinkers and coatings and articles coated with thermosetting coating compositions crosslinked with these novel crosslinkers.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: October 19, 1993
    Assignee: Eastman Kodak Company
    Inventors: J. Stewart Witzeman, Allen L. Crain, Robert J. Clemens
  • Patent number: 5247122
    Abstract: Disclosed are certain novel 2,2'-bisacetoacetates useful as crosslinking agents and a process for the preparation therefor. Also provided are novel enamel compositions containing the crosslinkers and coatings and articles coated with thermosetting coating compositions crosslinked with these novel crosslinkers.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: September 21, 1993
    Assignee: Eastman Kodak Company
    Inventors: J. Stewart Witzeman, Allen L. Crain, Robert J. Clemens
  • Patent number: 5206419
    Abstract: Process for the preparation of acetoacetates and other .beta.ketoesters is provided, involving reaction of nitrogen, oxygen or sulfur nucleophiles with a tertiaryalkyl acetoacetate or tertiaryalkyl .beta.-ketoester.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: April 27, 1993
    Assignee: Eastman Kodak Company
    Inventors: J. Stewart Witzeman, W. Dell Nottingham
  • Patent number: 5113011
    Abstract: Process for the preparation of acetoacetates and other .beta.-ketoesters is provided, involving reaction of nitrogen, oxygen or sulfur nucleophiles with a tertiaryalkyl acetoacetate or tertiaryalkyl-.beta.-ketoester.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: May 12, 1992
    Assignee: Eastman Kodak Company
    Inventors: J. Stewart Witzeman, W. Dell Nottingham
  • Patent number: 5095087
    Abstract: Disclosed are certain ketoxime-blocked polyisocyanates and polyester compositions containing the ketoxime-blocked polyisocyanates. Also disclosed are thermosetting powder coating compositions comprising one or more polyesters and at least one of the ketoxime-blocked polyisocyanates and articles coated with the powder coating compositions.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: March 10, 1992
    Assignee: Eastman Kodak Company
    Inventors: J. Stewart Witzeman, Glenn C. Jones
  • Patent number: 5051529
    Abstract: Process for the preparation of acetoacetates and other .beta.-ketoesters is provided, involving reaction of nitrogen, oxygen or sulfur nucleophiles with a tetriaryalkyl acetoacetate or tetriaryalkyl .beta.-ketoester.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: September 24, 1991
    Assignee: Eastman Kodak Company
    Inventors: J. Stewart Witzeman, W. Dell Nottingham
  • Patent number: 5028682
    Abstract: Disclosed are certain ketoxime-blocked polyisocyanates and polyester compositions containing the ketoxime-blocked polyisocyanates. Also disclosed are thermosetting powder coating compositions comprising one or more polyesters and at least one of the ketoxime-blocked polyisocyanates and articles coated with the powder coating compositions.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: July 2, 1991
    Assignee: Eastman Kodak Company
    Inventors: J. Stewart Witzeman, Glenn C. Jones