IP Library › Granted Patent US 5,922,356
Granted Patent Utility
US 5,922,356 · App. 08/947,463

Sustained release formulation

Inventors: Norimasa Koseki, Akihiko Sano
Patented Case View Patent ↗
Granted: Jul 13, 1999 Filed: Oct 9, 1997
Inventors
Norimasa Koseki
Akihiko Sano
Assignees (at issue)
Sumitomo Pharmaceuticals Company Limited
KOKEN 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 5,922,356
App. No.
08/947,463
Filed
1997-10-09
Granted
1999-07-13
Kind
A