Patents by Inventor Andrew G. Chalmers

Andrew G. Chalmers 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).

  • Oil coalescing filter and filtering process
    Patent number: 5129923
    Abstract: A filter and filtering process for coalescing droplets of atomized oil in a stream of gas includes an oil coalescing layer (14) of e.g. glass microfibres and a second layer (18) of felt or foam downstream of the coalescing layer (14). The drainage layer is impregnated with a fluorocarbon to reduce oil carry-over.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: July 14, 1992
    Assignee: Process Scientific Innovations limited
    Inventors: George S. Hunter, Andrew G. Chalmers