IP Library › Granted Patent US 5,184,020
Granted Patent Utility
US 5,184,020 · App. 07/428,510

Device and method for photoactivation

Inventors: David Paul Hearst, George D. Cimino, John E. Hearst, Stephen T. Isaacs
Patented Case View Patent ↗
Granted: Feb 2, 1993 Filed: Oct 26, 1989
Inventors
David Paul Hearst
George D. Cimino
John E. Hearst
Stephen T. Isaacs

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 5,184,020
App. No.
07/428,510
Filed
1989-10-26
Granted
1993-02-02
Kind
A