Patents by Inventor Roger J. R. Cairns

Roger J. R. Cairns 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).

  • Coal oil mixtures
    Patent number: 4330300
    Abstract: Coal/oil gels are prepared by grinding coal in crude petroleum or a petroleum fraction. The gels are thixotropic and can be transported by pipeline.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: May 18, 1982
    Assignee: The British Petroleum Company Limited
    Inventor: Roger J. R. Cairns
  • Oil separation material
    Patent number: 4129499
    Abstract: Anthracite packed oil water coalescers are treated with certain polymers, e.g. polybutene polyamines to improve their performance when dealing with sea water - oil emulsions.
    Type: Grant
    Filed: March 1, 1977
    Date of Patent: December 12, 1978
    Assignee: The British Petroleum Company Limited
    Inventors: Roger J. R. Cairns, Joan M. Howard nee Murtagh