Granted Patent
Utility
US 5,320,853 · App. 07/995,309
Controlled release formulation for pharmaceutical compounds
Inventors:
Kazuo Noda, Yoshiyuki Hirakawa, Hiroyuki Yoshino, David D. MacLaren, Paul F. Skultety, John R. Lefler, Greg M. Beck
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Dec 22, 1992
Inventors
Kazuo Noda
Yoshiyuki Hirakawa
Hiroyuki Yoshino
David D. MacLaren
Paul F. Skultety
John R. Lefler
Greg M. Beck
Assignee (at issue)
Merrell Dow Pharmaceuticals 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.