Patents by Inventor William G. Ruth

William G. Ruth 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: 6890999
    Abstract: A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from about 200 to about 2000 centipoise at 150° C. and a low temperature curing agent capable of maintaining its own domain during extrusion which is extruded as one component at a temperature below 220° F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300° F. and produces a coating having an exceptionally smooth surface with either a low or high gloss. The powder is particularly useful for coating heat sensitive substrates such as plastics, paper, cardboard and wood.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: May 10, 2005
    Assignee: Rohm and Haas Company
    Inventors: Jeno Muthiah, Jeremiah J. Teti, Jacquelyn M. Schlessman, William G. Ruth, Carryll A. Seelig
  • Patent number: 6703070
    Abstract: A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from out 200 to about 3000 centipoise at 150° C. and a low temperature curing agent is extruded or otherwise mixed in the molten state as one component at a temperature below 230° F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300° F. and produces a coating having an exceptionally smooth surface with either a low or high gloss. The powder is particulary useful for coating heat sensitive substrates such as plastic parts for automobiles, paper, cardboard and wood. Fiberboard having a pattern such as a simulated wood grain printed on its surface and a powder coating of this invention over said pattern has the appearance of natural wood.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: March 9, 2004
    Assignee: Morton International, Inc.
    Inventors: Jeno Muthiah, Jeremiah J. Teti, Jacquelyn M. Schlessman, William G. Ruth, Carryll A. Seelig
  • Patent number: 6616979
    Abstract: Provided are low temperature curing thermosetting epoxy powder coating compositions comprising at least one non-crystalline epoxy resin, at least one crystalline epoxy resin, a curing agent, and a cure catalyst. Coatings made from such powder compositions exhibit a substantial reduction in bubble entrapment, enough to prevent a visible haze from forming in the coating, when cured at low temperatures demanded by brass substrates.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: September 9, 2003
    Assignee: Rohm and Haas Company
    Inventors: William G. Ruth, Stacy L. Greth, Carryll A. Seelig, Dean A. Schreffler
  • Publication number: 20030149233
    Abstract: A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from about 200 to about 2000 centipoise at 150° C. and a low temperature curing agent capable of maintaining its own domain during extrusion which is extruded as one component at a temperature below 220° F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300° F. and produces a coating having an exceptionally smooth surface with either a low or high gloss. The powder is particularly useful for coating heat sensitive substrates such as plastics, paper, cardboard and wood.
    Type: Application
    Filed: October 24, 2002
    Publication date: August 7, 2003
    Inventors: Jeno Muthiah, Jeremiah J. Teti, Jacquelyn M. Schlessman, William G. Ruth, Carryll A. Seelig
  • Patent number: 6509413
    Abstract: A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from about 200 to about 2000 centipoise at 150° C. and a low temperature curing agent is extruded as one component at a temperature below 220° F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300° F. and produces a coating having a smooth surface with either a low or high gloss. The powder is particulary useful for coating heat-sensitive substrates such as plastics, paper, cardboard and wood.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: January 21, 2003
    Assignee: Rohm and Haas Company
    Inventors: Jeno Muthiah, Jeremiah J. Teti, Jacquelyn M. Schlessman, William G. Ruth, Carryll A. Seelig
  • Publication number: 20020019499
    Abstract: Provided are low temperature curing thermosetting epoxy powder coating compositions comprising at least one non-crystalline epoxy resin, at least one crystalline epoxy resin, a curing agent, and a cure catalyst. Coatings made from such powder compositions exhibit a substantial reduction in bubble entrapment, enough to prevent a visible haze from forming in the coating, when cured at low temperatures demanded by brass substrates, while the powders from which the coatings are made still exhibit good storage stability and melt-processability.
    Type: Application
    Filed: August 13, 2001
    Publication date: February 14, 2002
    Inventors: William G. Ruth, Stacy L. Greth, Carryll A. Seelig, Dean A. Schreffler
  • Patent number: 6309751
    Abstract: To a substrate such as brass is applied a powder coating comprising a) at least one non-crystalline epoxy resin, b) at least one crystalline epoxy resin such as tetramethylbisphenol diglycidyl ether in an amount sufficient to reduce or eliminate bubble entrapment within the cured coating when cured at a temperature of below about 350° F. (about 177° C.), and c) a curing agent such as dicyandiamide.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: October 30, 2001
    Assignee: Rohm and Haas Company
    Inventors: William G. Ruth, Stacy L. Greth, Carryll A. Seelig, Dean A. Schreffler
  • Patent number: 6140430
    Abstract: Provided are low temperature curing thermosetting epoxy powder coating compositions comprising at least one non-crystalline epoxy resin, at least one crystalline epoxy resin, a curing agent, and a cure catalyst. Coatings made from such powder compositions exhibit a substantial reduction in bubble entrapment, enough to prevent a visible haze from forming in the coating, when cured at low temperatures demanded by brass substrates, while the powders from which the coatings are made still exhibit good storage stability and melt-processability.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: October 31, 2000
    Assignee: Morton International Inc.
    Inventors: William G. Ruth, Stacy L. Greth, Carryll A. Seelig, Dean A. Schreffler