Granted Patent
Utility
US 4,584,191 · App. 06/446,116
Hair care and skin care compositions containing biotin ethyl ester
Inventors:
Hans-Ulrich Hostettler, Bruno Poncioni
Patented Case
View Patent ↗
Granted: Apr 22, 1986
Filed: Dec 2, 1982
Inventors
Hans-Ulrich Hostettler
Bruno Poncioni
Assignee (at issue)
HOFFMANN-LA ROCHE 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.