Granted Patent
Utility
US 4,822,917 · App. 07/133,807
Process for the hydroformylation of an olefin
Inventors:
Chihiro Miyazawa, Hiroshi Mikami, Akio Tsuboi, Katsuhide Hamano
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Dec 16, 1987
Inventors
Chihiro Miyazawa
Hiroshi Mikami
Akio Tsuboi
Katsuhide Hamano
Assignee (at issue)
Mitsubishi Chemical Industries, Ltd.
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.