Granted Patent
Utility
US 6,486,367 · App. 08/980,542
Process for the hydrogenation of maleic acid to 1,4-butanediol
Inventors:
John R. Budge, Thomas G. Attig, Robert A. Dubbert
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Dec 1, 1997
Inventors
John R. Budge
Thomas G. Attig
Robert A. Dubbert
Assignee (at issue)
The Standard Oil 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.