Granted Patent
Utility
US 6,136,981 · App. 09/334,776
Preparation of 4-phenyl-1,2,3,6-tetrahydropyridines
Inventors:
Francis Brion, Christian Richard
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Jun 16, 1999
Inventors
Francis Brion
Christian Richard
Assignee (at issue)
Hoechst Marion Roussel
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.