Granted Patent
Utility
US 4,690,682 · App. 06/819,979
Sustained release
Inventor:
Franklin Lim
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Jan 14, 1986
Inventor
Franklin Lim
Assignee (at issue)
Damon Biotech, 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.