Granted Patent
Utility
US 5,017,382 · App. 07/469,045
Controlled release compositions (II)
Inventors:
Mostyn P. Embrey, Neil B. Graham
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Jan 23, 1990
Inventors
Mostyn P. Embrey
Neil B. Graham
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.