Granted Patent
Utility
US 3,992,784 · App. 05/585,914
Thermal dewatering of brown coal
Inventors:
Eke Verschuur, Berend P. Ter Meulen, Teunis VAN Herwijnen, Johannes Boom
Patented Case
View Patent ↗
Granted: Nov 23, 1976
Filed: Jun 11, 1975
Inventors
Eke Verschuur
Berend P. Ter Meulen
Teunis VAN Herwijnen
Johannes Boom
Assignee (at issue)
SHELL OIL 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.