Granted Patent
Utility
US 6,316,472 · App. 09/551,046
Heterosubstituted pyridine derivatives as PDE 4 inhibitors
Inventors:
Richard Frenette, Yves Ducharme, Sylvie Prescott
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Apr 17, 2000
Inventors
Richard Frenette
Yves Ducharme
Sylvie Prescott
Assignee (at issue)
Merck Frosst Canada Ltd.
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.