Granted Patent
Utility
US 5,452,581 · App. 08/222,205
Olefin recovery method
Inventors:
Cong Dinh, William C. Petterson, Ashutosh Rastogi, Vijender K. Verma
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Apr 1, 1994
Inventors
Cong Dinh
William C. Petterson
Ashutosh Rastogi
Vijender K. Verma
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.