Granted Patent
Utility
US 5,863,978 · App. 08/938,434
Polymers compositions
Inventor:
Philippe Vosters
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Sep 26, 1997
Inventor
Philippe Vosters
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.