Granted Patent
Utility
US 4,758,436 · App. 07/048,490
Drug delivery device which can be retained in the stomach for a controlled period of time
Inventors:
Larry J. Caldwell, Colin R. Gardner, Robyn C. Cargill, Takeru Higuchi
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: May 7, 1987
Inventors
Larry J. Caldwell
Colin R. Gardner
Robyn C. Cargill
Takeru Higuchi
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.