Granted Patent
Utility
US 5,344,657 · App. 08/043,592
Microbeads of diltiazem, a process for their manufacture and a substained-release pharmaceutical composition containing them
Inventor:
Henri Desmolin
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Apr 5, 1993
Inventor
Henri Desmolin
Assignee (at issue)
Societe Anonyme: Elf Sanofi
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.