Granted Patent
Utility
US 4,228,297 · App. 06/022,395
Process for the production of hydroxyalkylphenyl derivatives
Inventors:
Joerg Haeberli, Kyong Pae Park, Anthony F. Vellturo, George F. Nurnberger
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Mar 21, 1979
Inventors
Joerg Haeberli
Kyong Pae Park
Anthony F. Vellturo
George F. Nurnberger
Assignee (at issue)
Ciba-Geigy
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.