IP Library › Granted Patent US 4,409,332
Granted Patent Utility
US 4,409,332 · App. 06/338,973

Collagen-enzyme conjugates that exhibit no inflammatory response and method for making the same

Inventors: Steven R. Jefferies, James L. Gutmann, Barry M. Heatfield
Patented Case View Patent ↗
Granted: Oct 11, 1983 Filed: Jan 12, 1982
Inventors
Steven R. Jefferies
James L. Gutmann
Barry M. Heatfield

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 4,409,332
App. No.
06/338,973
Filed
1982-01-12
Granted
1983-10-11
Kind
A