Patents by Inventor Joan M. Howard nee Murtagh

Joan M. Howard nee Murtagh 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 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