Patents by Inventor Douglas B. Armstrong

Douglas B. Armstrong 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).

  • Process for storing and delivering gas
    Patent number: 5673735
    Abstract: A process for storing and delivering gas. In the first step of this process, a multiplicity of at least four gas banks is filled with compressed gas to a specified pressure, the gas pressure in each of the gas banks is sequentially measured, a control system sequentially selects one of the gas banks and withdraws gas from it to the device to be filled until the rate of gas flow is less than optimum, the control system then withdraws gas from the next sequential of the gas banks while replenishing the gas in the first depleted of said gas banks.
    Type: Grant
    Filed: February 7, 1995
    Date of Patent: October 7, 1997
    Assignee: Aurora Technology Corporation
    Inventors: Paul M. Crvelin, Douglas B. Armstrong