Patents by Inventor Doreen E. Smith

Doreen E. Smith 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).

  • Apparatus and method for quantitatively measuring liquid film drying rates on substrates
    Patent number: 7886590
    Abstract: An apparatus and method for measuring the drying rate of a liquid or liquid film in air or other gaseous media by either: a) measuring changes in the print density of the liquid; b) measuring changes in the dynamic surface tension of the liquid; c) measuring the differential pressure between an inert gas required to displace a sample of the liquid drawn into a capillary tube from a reservoir of the liquid and the pressure required for a bubble of the gas to form in the reservoir; and d) measuring the electrical conductance or resistance of the liquid.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: February 15, 2011
    Assignee: Sun Chemical Corporation
    Inventors: Ryszard Sprycha, Doreen E. Smith, David Biro, Juanita Parris, Mikhail Laksin, Gregory Pace
  • Flexographic ink composition containing hydrolyzed gelatin as a binder resin
    Patent number: 6669769
    Abstract: A flexographic preprint ink composition, which includes at least 3 weight percent of a pigment; at least 15 weight percent of a hydrolyzed gelatin; and water. The ink composition may also contain conventional additives, such as surfactants and defoaming agents, typically found in flexographic ink compositions. The flexographic ink composition can exhibit better heat resistance, mileage, strength, wet trap, foam resistance, drying, stability, and plate transfer than conventional flexographic inks which contain soy as a binder.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: December 30, 2003
    Assignee: Sun Chemical Corporation
    Inventor: Doreen E. Smith
  • Flexographic ink composition containing hydrolyzed gelatin as a binder resin
    Publication number: 20030136302
    Abstract: A flexographic preprint ink composition, which includes at least 3 weight percent of a pigment; at least 15 weight percent of a hydrolyzed gelatin; and water. The ink composition may also contain conventional additives, such as surfactants and defoaming agents, typically found in flexographic ink compositions. The flexographic ink composition can exhibit better heat resistance, mileage, strength, wet trap, foam resistance, drying, stability, and plate transfer than conventional flexographic inks which contain soy as a binder.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 24, 2003
    Inventor: Doreen E. Smith
  • Printing inks having low volatile organic compounds and methods of producing same
    Patent number: 6544322
    Abstract: A printing ink composition containing resin and glycerine, wherein the composition has less than 5 wt. % volatile organic compounds and has no hazardous air pollutants and a method of preparing such composition.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: April 8, 2003
    Assignee: Sun Chemical Corporation
    Inventors: Clay McCall, Ricky V. Mitchell, Doreen E. Smith
  • Printing inks having low volatile organic compounds and methods of producing same
    Publication number: 20020148384
    Abstract: A printing ink composition containing resin and glycerine, wherein the composition has less than 5 wt. % volatile organic compounds and has no hazardous air pollutants and a method of preparing such composition.
    Type: Application
    Filed: January 5, 2001
    Publication date: October 17, 2002
    Inventors: Clay McCall, Ricky V. Mitchell, Doreen E. Smith