Patents by Inventor David Hugo Gracias

David Hugo Gracias 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).

  • Reconfigurable lithographic structures
    Patent number: 8703073
    Abstract: A lithographically structured device has an actuation layer and a control layer operatively connected to the actuation layer. The actuation layer includes a stress layer and a neutral layer that is constructed of materials and with a structure such that it stores torsional energy upon being constructed. The control layer is constructed to maintain the actuation layer substantially in a first configuration in a local environmental condition and is responsive to a change in the local environmental condition such that it permits a release of stored torsional energy to cause a change in a structural configuration of the lithographically structured device to a second configuration, the control layer thereby providing a trigger mechanism. The lithographically structured device has a maximum dimension that is less than about 10 mm when it is in the second configuration.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: April 22, 2014
    Assignee: The Johns Hopkins University
    Inventors: David Hugo Gracias, Timothy Gar-Ming Leong
  • RECONFIGURABLE LITHOGRAPHIC STRUCTURES
    Publication number: 20100326071
    Abstract: A lithographically structured device has an actuation layer and a control layer operatively connected to the actuation layer. The actuation layer includes a stress layer and a neutral layer that is constructed of materials and with a structure such that it stores torsional energy upon being constructed. The control layer is constructed to maintain the actuation layer substantially in a first configuration in a local environmental condition and is responsive to a change in the local environmental condition such that it permits a release of stored torsional energy to cause a change in a structural configuration of the lithographically structured device to a second configuration, the control layer thereby providing a trigger mechanism. The lithographically structured device has a maximum dimension that is less than about 10 mm when it is in the second configuration.
    Type: Application
    Filed: March 6, 2009
    Publication date: December 30, 2010
    Applicant: THE JOHN HOPKINS UNIVERSITY
    Inventors: David Hugo Gracias, Timothy Gar-Ming Leong