IP Library › Granted Patent US 4,289,896
Granted Patent Utility
US 4,289,896 · App. 06/075,789

Transesterification process

Inventor: Lothar Buxbaum
Patented Case View Patent ↗
Granted: Sep 15, 1981 Filed: Sep 17, 1979
Inventor
Lothar Buxbaum
Assignee (at issue)
Ciba-Geigy

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 4,289,896
App. No.
06/075,789
Filed
1979-09-17
Granted
1981-09-15
Kind
A