Patents by Inventor Lily F.W. Walsh

Lily F.W. Walsh 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).

  • Method for preparing sodium nitrotetrazolate using cation exchange resin
    Patent number: 10947204
    Abstract: The present invention is directed to a method for preparing 5-nitrotetrazolate using a strongly acidic ionic cation exchange resin that has improve yields over prior art methods. The methods disclosed herein can be used either in a batch process or continuous flow reactor. In one exemplary process, starting material sodium 5-aminotetrazolate in solution is added into a reaction vessel containing a strongly acidic ionic cation exchange resin to facilitate production of 5-nitrotetrazolate. Multiple reactors containing resins may be connected in series to improve 5-nitrotetrazolate yields and purity levels.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: March 16, 2021
    Assignee: U.S. Government as Represented by the Secretary of the Army
    Inventors: R. Hunter Muir, Andrew G. Pearsall, Jerry S. Salan, Matthew L. Jorgensen, Jon G. Bragg, Neha Mehta, John W. Fronabarger, Jason B. Pattison, Lily F. W. Walsh
  • Purification of flow sodium 5-nitrotetrazolate solutions with copper modified cation exchange resin
    Patent number: 10464908
    Abstract: Described are methods for purifying a 5-nitrotetrazolate solution with a copper(II) modified cation exchange resin. The method can be performed as a stand-alone system or as a system integrated into a continuous flow reactor.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: November 5, 2019
    Assignee: Pacific Scientific Energetic Materials Company
    Inventors: John W. Fronabarger, Jason B. Pattison, Lily F. W. Walsh
  • Purification of Flow Sodium 5- Nitrotetrazolate Solutions with Copper Modified Cation Exchange Resin
    Publication number: 20180111909
    Abstract: Described are methods for purifying a 5-nitrotetrazolate solution with a copper(II) modified cation exchange resin. The method can be performed as a stand-alone system or as a system integrated into a continuous flow reactor.
    Type: Application
    Filed: September 7, 2017
    Publication date: April 26, 2018
    Inventors: John W. Fronabarger, Jason B. Pattison, Lily F.W. Walsh