Granted Patent
Utility
US 5,994,548 · App. 08/849,418
Crystallisation of levibupivacaine and analogues thereof
Inventors:
Marianne Langston, Benjamin Mark Skead
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Apr 25, 1997
Inventors
Marianne Langston
Benjamin Mark Skead
Assignee (at issue)
Darwin Discovery Limited
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.