Granted Patent
Utility
US 5,220,100 · App. 07/920,694
Method of removing lithium compounds from a polymer
Inventors:
Stephen N. Massie, Jaroslav G. Balas, Loralee A. Logan
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Jul 28, 1992
Inventors
Stephen N. Massie
Jaroslav G. Balas
Loralee A. Logan
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.