Granted Patent
Utility
US 4,292,448 · App. 06/142,686
Process for the hydroformylation of olefins
Inventors:
Yoshitoshi Tsunoda, Shimpei Tomita, Chihiro Miyazawa
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Apr 22, 1980
Inventors
Yoshitoshi Tsunoda
Shimpei Tomita
Chihiro Miyazawa
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.