Granted Patent
Utility
US 6,733,767 · App. 09/271,098
Liquid polymeric compositions for controlled release of bioactive substances
Inventors:
Rey T. Chern, Joel R. Zingerman
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Mar 18, 1999
Inventors
Rey T. Chern
Joel R. Zingerman
Assignee (at issue)
MERCK & CO., INC.
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.