IP Library › Granted Patent US 4,536,581
Granted Patent Utility
US 4,536,581 · App. 06/495,713

Process for preparing 2,2,6,6-tetramethyl-4-piperidone

Inventors: Giuseppe Cantatore, Paolo Cassandrini
Patented Case View Patent ↗
Granted: Aug 20, 1985 Filed: May 18, 1983
Inventors
Giuseppe Cantatore
Paolo Cassandrini
Assignee (at issue)
Ciba-Geigy S.p.A.

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,536,581
App. No.
06/495,713
Filed
1983-05-18
Granted
1985-08-20
Kind
A