Granted Patent
Utility
US 4,885,411 · App. 07/234,354
Hydrogenation process for converting lactones to diols
Inventors:
Waldo De Thomas, Paul D. Taylor
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Aug 19, 1988
Inventors
Waldo De Thomas
Paul D. Taylor
Assignee (at issue)
GAF 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.