Patents by Inventor Eric B. Wendler

Eric B. Wendler 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).

  • Multicolor heat-sensitive verification and highlighting system
    Patent number: 5644352
    Abstract: A document capable of providing multiple colors under the application of heat comprising a support having at least one surface bearing a first coating comprising a substantially colorless, heat activatable chromogenic composition capable of producing a first color under the application of heat, and a second coating comprising a localized coating of a substantially colorless, heat activatable chromogenic composition capable of producing a second color under the application of heat. Each chromogenic composition comprises a chromogenic compound and a color developer that are substantially colorless solids in physical contact prior to reaction, but which can chemically react to produce a visible colored image by application of heat at temperatures above room temperature. Under the application of heat from a thermal printer, by quickly striking the chromogenic composition with a fingernail or blunt object to produce frictional heat, or other heat application, multicolored images are provided.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: July 1, 1997
    Assignee: Wallace Computer Services, Inc.
    Inventors: John C. H. Chang, Eric B. Wendler, Vance P. Gregory, Jr.
  • Multicolor heat-sensitive verification and highlighting system
    Patent number: 5618063
    Abstract: A document capable of providing multiple colors under the application of heat comprising a support having at least one surface bearing a first coating comprising a substantially colorless, heat activatable chromogenic composition capable of producing a first color under the application of heat, and a second coating comprising a localized coating of a substantially colorless, heat activatable chromogenic composition capable of producing a second color under the application of heat. Each chromogenic composition comprises a chromogenic compound and a color developer that are substantially colorless solids in physical contact prior to reaction, but which can chemically react to produce a visible colored image by application of heat at temperatures above room temperature. Under the application of heat from a thermal printer, by quickly striking the chromogenic composition with a fingernail or blunt object to produce frictional heat, or other heat application, multicolored images are provided.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: April 8, 1997
    Assignee: Wallace Computer Services, Inc.
    Inventors: John C. H. Chang, Eric B. Wendler, Vance P. Gregory, Jr.