Patents by Inventor Patrick Perré

Patrick Perré 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).

  • Wood accelerating drying process based on its rheological properties
    Patent number: 6910284
    Abstract: The objective of the present invention is an accelerated drying process for wood, capable of use with all species and of maintaining the quality of the dried wood intact, in which the temperature of the system is kept within the glass transition temperature range, for an appropriate period so as to attain the intended humidity ratio of the wood. It relates to an accelerated drying process for wood based on the rheological properties (hygro-thermalviscoelastic) of the latter, where the glass transition temperature of lignin is used as a relaxant or neutralization agent for the residual growth stress of trees, as well as those from the drying process. The process is controlled by monitoring the temperatures of the wood through the use of thermocouples placed along the length of the pieces. Furthermore, the use of the process of the present invention provides a significant reduction in the drying time and a reduction of the defects because molecular fluidity is maintained.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: June 28, 2005
    Assignees: Empresa Brasileira de Pesquisa Agropecuaria-Embrapa, Ecole Nationale du Genie Rural des Eaux et des Forets-Engref
    Inventors: Osmar José Romeiro de Aguiar, Patrick Perré
  • Wood accelerating drying process based on its rheological properties
    Publication number: 20030099275
    Abstract: The objective of the present invention is an accelerated drying process for wood, capable of use with all species and of maintaining the quality of the dried wood intact, in which the temperature of the system is kept within the glass transition temperature range, for an appropriate period so as to attain the intended humidity ratio of the wood. It relates to an accelerated drying process for wood based on the rheological properties (hygro-thermalviscoelastic) of the latter, where the glass transition temperature of lignin is used as a relaxant or neutralization agent for the residual growth stress of trees, as well as those from the drying process. The process is controlled by monitoring the temperatures of the wood through the use of thermocouples placed along the length of the pieces. Furthermore, the use of the process of the present invention provides a significant reduction in the drying time and a reduction of the defects because molecular fluidity is maintained.
    Type: Application
    Filed: October 8, 2002
    Publication date: May 29, 2003
    Inventors: Osmar Jose Romeiro De Aguiar, Patrick Perre