Granted Patent
Utility
US 6,031,129 · App. 08/538,561
Use of pentavalent group VA oxides in acetic acid processing
Inventors:
James A. Hinnenkamp, Noel C. Hallinan
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Oct 3, 1995
Inventors
James A. Hinnenkamp
Noel C. Hallinan
Assignee (at issue)
Quantum Chemical 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.