IP Library Granted Patent US 4,650,851
Granted Patent Utility
US 4,650,851 · App. 06/841,489

Purification of glycolide

Inventors: David Rhum, Richard S. Matthews
Patented Case View Patent ↗
Granted: Mar 17, 1987 Filed: Mar 19, 1986
Inventors
David Rhum
Richard S. Matthews
Assignee (at issue)
Pfizer Hospital Products Group, Inc.

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 4,650,851
App. No.
06/841,489
Filed
1986-03-19
Granted
1987-03-17
Kind
A