Granted Patent
Utility
US 5,310,948 · App. 08/082,211
Carbonylation of epoxides
Inventors:
Eit Drent, Eric Kragtwijk
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Jun 24, 1993
Inventors
Eit Drent
Eric Kragtwijk
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.