Granted Patent
Utility
US 4,675,378 · App. 06/864,658
Process control system
Inventors:
John D. Gibbon, Virgil J. Adkins
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: May 19, 1986
Inventors
John D. Gibbon
Virgil J. Adkins
Assignee (at issue)
Celanese GmbH
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.