IP Library › Granted Patent US 5,091,417
Granted Patent Utility
US 5,091,417 · App. 07/579,956

Preventive and therapeutic agent for hepatitis

Inventors: Masahiro Watanabe, Kazumasa Yokoyama
Patented Case View Patent ↗
Granted: Feb 25, 1992 Filed: Sep 10, 1990
Inventors
Masahiro Watanabe
Kazumasa Yokoyama
Assignees (at issue)
Green Cross Corporation
TAISHO PHARMACEUTICAL CO., LTD.

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 5,091,417
App. No.
07/579,956
Filed
1990-09-10
Granted
1992-02-25
Kind
A