Granted Patent
Utility
US 5,480,892 · App. 08/298,268
(N-phthalimidoalkyl)piperidines
Inventors:
Engelbert Ciganek, Sang William Tam, Ann Sorrentino Wright
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Aug 31, 1994
Inventors
Engelbert Ciganek
Sang William Tam
Ann Sorrentino Wright
Assignee (at issue)
The DuPont Merck Pharmaceutical Company
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.