Patents by Inventor Prerona Chakravarty

Prerona Chakravarty 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).

  • Methods for freeze drying
    Patent number: 8549768
    Abstract: A method for producing a fog of ice nuclei by introducing a cryogenic fluid and a humid gas stream into a freeze dryer. The cryogenic fluid and humid gas stream will form ice nuclei having a preferred size for introduction into vials contained in the freeze dryer.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: October 8, 2013
    Assignee: Linde Aktiengesellschaft
    Inventors: Prerona Chakravarty, Ron C. Lee
  • FREEZE DRYING SYSTEM
    Publication number: 20110179667
    Abstract: A method for distributing a cryogenic fluid inside a freeze drying chamber. The cryogenic fluid is fed into the freeze drying chamber through a venturi device. The cryogenic fluid will form an ice fog which will be rapidly and uniformly distributed throughout the freezing chamber and into the vials present in the freezing chamber.
    Type: Application
    Filed: September 15, 2010
    Publication date: July 28, 2011
    Inventors: Ron C. Lee, Prerona Chakravarty