Patents by Inventor Carl W. Hohmann

Carl W. Hohmann 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).

  • Automated propellant blending
    Patent number: 6132536
    Abstract: An automated propellant blending apparatus and method uses closely metered addition of countersolvent to a binder solution with propellant particles dispersed therein to precisely control binder precipitation and particle aggregation. A profile of binder precipitation versus countersolvent-solvent ratio is established empirically and used in a computer algorithm to establish countersolvent addition parameters near the cloud point for controlling the transition of properties of the binder during agglomeration and finishing of the propellant composition particles. The system is remotely operated by computer for safety, reliability and improved product properties, and also increases product output.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: October 17, 2000
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Carl W. Hohmann, Douglas W. Harrington, Maureen L. Dutton, Billy Charles Tipton, Jr., James W. Bacak, Frank Salazar
  • Automated propellant blending
    Patent number: 5879079
    Abstract: An automated propellant blending apparatus and method uses closely metered addition of countersolvent to a binder solution with propellant particles dispersed therein to precisely control binder precipitation and particle aggregation. A profile of binder precipitation versus countersolvent-solvent ratio is established empirically and used in a computer algorithm to establish countersolvent addition parameters near the cloud point for controlling the transition of properties of the binder during agglomeration and finishing of the propellant composition particles. The system is remotely operated by computer for safety, reliability and improved product properties, and also increases product output.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: March 9, 1999
    Assignee: The United States of America as represented by the Administrator, of the National Aeronautics and Space Administration
    Inventors: Carl W. Hohmann, Douglas W. Harrington, Maureen L. Dutton, Billy Charles Tipton, Jr., James W. Bacak, Frank Salazar