Patents by Inventor Patrick C. McGrath

Patrick C. McGrath 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).

  • Demulsifying process
    Patent number: 4596653
    Abstract: Emulsions of oil and water are broken by treating them with a demulsifier which is a polysiloxane polyalkylene oxide copolymer in which the polyalkylene oxide segment is composed of random ethylene oxide and propylene oxide units.The demulsifier is particularly useful in breaking emulsions of water in crude oil which are normally difficult to separate and in breaking emulsions at relatively low temperatures, e.g. 30.degree. to 45.degree. C.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: June 24, 1986
    Assignee: The British Petroleum Company p.l.c.
    Inventors: David E. Graham, Werner A. Lidy, Patrick C. McGrath, David G. Thompson