Granted Patent
Utility
US 5,196,552 · App. 07/769,644
Preparation of cyclic ethers
Inventors:
K. Pushpananda A. Senaratne, Patrick S. Bynum, Kenneth C. Lilje, Edward F. Zaweski
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Oct 2, 1991
Inventors
K. Pushpananda A. Senaratne
Patrick S. Bynum
Kenneth C. Lilje
Edward F. Zaweski
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.