Granted Patent
Utility
US 6,147,225 · App. 09/088,991
Thiacrown ether compound
Inventors:
Janet A. Gaboury, Fu-Lung Chen
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Jun 2, 1998
Inventors
Janet A. Gaboury
Fu-Lung Chen
Assignee (at issue)
Betzdearborn, Inc.
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.