Patents by Inventor David P. J. Miller

David P. J. Miller 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 extraction method
    Patent number: 4610793
    Abstract: A downhole tool for use in recovering a first fluid from a mixture of fluids in a confined space, comprising a collector for the mixture, separator means for receiving the mixture from the collector and for separating the first fluid from the mixture, means for expanding the volume of the residual fluid of the mixture, and means for feeding the expanded fluid into the confined space thereby to provide sufficient pressure within the confined space to force uncollected mixture into the collector and then to the separator means.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: September 9, 1986
    Inventor: David P. J. Miller