Granted Patent
Utility
US 4,551,239 · App. 06/631,980
Water based demulsifier formulation and process for its use in dewatering and desalting crude hydrocarbon oils
Inventors:
Philip Merchant, Jr., Sylvia M. Lacy
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Jul 18, 1984
Inventors
Philip Merchant, Jr.
Sylvia M. Lacy
Assignee (at issue)
Exxon Research and Engineering Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.