Granted Patent
Utility
US 5,780,646 · App. 08/660,029
Cyclic ether compounds
Inventors:
Sharat Singh, Edwin F. Ullman
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Jun 6, 1996
Inventors
Sharat Singh
Edwin F. Ullman
Assignee (at issue)
Behringwerke Aktiengesellschaft
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.