Granted Patent
Utility
US 4,221,743 · App. 05/703,130
Hydroformylation process
Inventors:
Robert W. Halstead, John C. Chaty
Patented Case
View Patent ↗
Granted: Sep 9, 1980
Filed: Jul 7, 1976
Inventors
Robert W. Halstead
John C. Chaty
Assignee (at issue)
Union Carbide Corporation
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.