Granted Patent
Utility
US 5,612,396 · App. 08/471,544
Copolymers
Inventors:
Salvatore Valenti, Bernhard Leikauf, Akira Ohta
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: Jun 6, 1995
Inventors
Salvatore Valenti
Bernhard Leikauf
Akira Ohta
Assignee (at issue)
Sandoz AG
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.