IP Library › Granted Patent US 4,806,621
Granted Patent Utility
US 4,806,621 · App. 06/820,351

Biocompatible, bioerodible, hydrophobic, implantable polyimino carbonate article

Inventors: Joachim B. Kohn, Robert S. Langer
Patented Case View Patent ↗
Granted: Feb 21, 1989 Filed: Jan 21, 1986
Inventors
Joachim B. Kohn
Robert S. Langer
Assignee (at issue)
MASSACHUSETTS INSTITUTE OF TECHNOLOGY

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 4,806,621
App. No.
06/820,351
Filed
1986-01-21
Granted
1989-02-21
Kind
A