Granted Patent
Utility
US 5,336,767 · App. 07/998,749
Total or partial esters of hyaluronic acid
Inventors:
Francesco Della Valle, Aurelio Romeo
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Dec 30, 1992
Inventors
Francesco Della Valle
Aurelio Romeo
Assignee (at issue)
FIDIA S.P.A.
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.