Granted Patent
Utility
US 4,873,091 · App. 07/197,375
Controlled release formulating employing resilient microbeads
Inventors:
Laura J. Jankower, Larry W. Shipley
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: May 23, 1988
Inventors
Laura J. Jankower
Larry W. Shipley
Assignee (at issue)
Advanced Poymer Systems, 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.