Granted Patent
Utility
US 6,109,539 · App. 09/028,372
Controlled release of substances
Inventors:
Ashok V. Joshi, Truman Wold, John J. McEvoy
Patented Case
View Patent ↗
Granted: Aug 29, 2000
Filed: Feb 24, 1998
Inventors
Ashok V. Joshi
Truman Wold
John J. McEvoy
Assignee (at issue)
Ceramatec, 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.