Granted Patent
Utility
US 4,247,486 · App. 05/776,934
Cyclic hydroformylation process
Inventors:
Everard A. V. Brewester, Roy L. Pruett
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Mar 11, 1977
Inventors
Everard A. V. Brewester
Roy L. Pruett
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.