Granted Patent
Utility
US 4,585,889 · App. 06/695,496
Carbonylation process for the production of monoesters aromatic dicarboxylic acids from phosphonium salts
Inventors:
Carl M. Lentz, James R. Overton, David D. Cornell
Patented Case
View Patent ↗
Granted: Apr 29, 1986
Filed: Jan 28, 1985
Inventors
Carl M. Lentz
James R. Overton
David D. Cornell
Assignee (at issue)
EASTMAN KODAK COMPANY
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.