Granted Patent
Utility
US 4,055,512 · App. 05/701,496
Catalyst for producing cycloolefin and method for making the same
Inventors:
Yoichi Kageyama, Yozo Kato, Hisao Kosugi
Patented Case
View Patent ↗
Granted: Oct 25, 1977
Filed: Jul 1, 1976
Inventors
Yoichi Kageyama
Yozo Kato
Hisao Kosugi
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.