Granted Patent
Utility
US 5,276,199 · App. 08/016,447
Process for preparing cyclopentenones
Inventors:
John Y. Lee, Meng-Sheng Ao, Stephen E. Belmont
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Feb 11, 1993
Inventors
John Y. Lee
Meng-Sheng Ao
Stephen E. Belmont
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.