Patents by Inventor Tamara Perez-Cruz

Tamara Perez-Cruz 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).

  • Removing impurities from polythiophene
    Patent number: 7321021
    Abstract: Impurities are removed from polythiophene by mixing a composition comprising polythiophene, water and an organic liquid at a temperature at which the organic liquid dissolves the polythiophene; allowing an aqueous phase to separate from an organic phase and recovering organic phase; adding water to recovered organic phase and mixing the resulting composition at a temperature at which the organic liquid dissolves the polythiophene; allowing an aqueous phase to separate from an organic phase and recovering organic phase; and allowing polythiophene solid to precipitate from recovered organic phase.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: January 22, 2008
    Assignee: Xerox Corporation
    Inventors: Alan Edward John Toth, Tamara Perez-Cruz
  • Polythiophene processes
    Patent number: 7314908
    Abstract: Polythiophene may be processed using a method including providing a composition including the polythiophene and a liquid including at least one hydrocarbon having at least 6 carbon atoms; heating the composition to a temperature of at least about 50° C.; and separating solid polythiophene from the heated composition. Alternatively, the method may include providing a composition including polythiophene and an organic liquid; heating the composition to dissolve a portion of the polythiophene in the organic liquid; and separating solid polythiophene from the heated composition.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: January 1, 2008
    Assignee: Xerox Corporation
    Inventors: Alan Edward John Toth, Tamara Perez-Cruz
  • Polythiophene processes
    Publication number: 20070117961
    Abstract: Polythiophene may be processed using a method including providing a composition including the polythiophene and a liquid including at least one hydrocarbon having at least 6 carbon atoms; heating the composition to a temperature of at least about 50° C.; and separating solid polythiophene from the heated composition. Alternatively, the method may include providing a composition including polythiophene and an organic liquid; heating the composition to dissolve a portion of the polythiophene in the organic liquid; and separating solid polythiophene from the heated composition.
    Type: Application
    Filed: November 18, 2005
    Publication date: May 24, 2007
    Applicant: Xerox Corporation
    Inventors: Alan Toth, Tamara Perez Cruz
  • Removing impurities from polythiophene
    Publication number: 20060217524
    Abstract: Impurities are removed from polythiophene by mixing a composition comprising polythiophene, water and an organic liquid at a temperature at which the organic liquid dissolves the polythiophene; allowing an aqueous phase to separate from an organic phase and recovering organic phase; adding water to recovered organic phase and mixing the resulting composition at a temperature at which the organic liquid dissolves the polythiophene; allowing an aqueous phase to separate from an organic phase and recovering organic phase; and allowing polythiophene solid to precipitate from recovered organic phase.
    Type: Application
    Filed: March 22, 2005
    Publication date: September 28, 2006
    Applicant: XEROX CORPORATION
    Inventors: Alan Toth, Tamara Perez-Cruz