Granted Patent
Utility
US 5,087,788 · App. 07/663,387
Preparation of high purity vinylindene olefin
Inventor:
Feng-Jung Wu
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Mar 4, 1991
Inventor
Feng-Jung Wu
Assignee (at issue)
Ethyl Corporation
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.