Patents by Inventor John H Doran

John H Doran 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).

  • Non-linear waveguided laser channel for a gas laser
    Patent number: 7894500
    Abstract: An RF-excited waveguide laser module comprises a first electrode having a first elongate surface defining in part a waveguide laser channel extending along an optical axis, the first elongate surface having a substantially linear cross-section normal to the optical axis. A second electrode has a second elongate surface defining in part the waveguide laser channel extending along the optical axis. The second elongate surface has a non-linear cross-section normal to the optical axis. A dielectric insert may be provided between the electrodes defining in part the waveguide laser channel. A lengthwise gap may extend essentially an entire length of the waveguide laser channel between one of the first and second electrodes and the dielectric insert. The gap provides fluid communication between the waveguide laser channel and a volume outside the waveguide laser channel.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: February 22, 2011
    Assignee: Epilog Corporation
    Inventors: Jeffery A Broderick, John H Doran, Steven F Garnier, Chad A Mitchiner
  • Waveguided laser channels for a gas laser
    Patent number: 7570683
    Abstract: An RF-excited waveguide laser module comprises a first electrode having a first elongate surface defining in part a waveguide laser channel extending along an optical axis, the first elongate surface having a substantially linear cross-section normal to the optical axis. A second electrode has a second elongate surface defining in part the waveguide laser channel extending along the optical axis. The second elongate surface has a non-linear cross-section normal to the optical axis. A dielectric insert may be provided between the electrodes defining in part the waveguide laser channel. A lengthwise gap may extend essentially an entire length of the waveguide laser channel between one of the first and second electrodes and the dielectric insert. The gap provides fluid communication between the waveguide laser channel and a volume outside the waveguide laser channel.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: August 4, 2009
    Assignee: Epilog Corporation
    Inventors: Jeffery A Broderick, John H Doran, Steven F Garnier, Chad A Mitchiner