Granted Patent
Utility
US 5,502,240 · App. 08/488,561
Esterification process using a titamium zeolite catalyst
Inventors:
Joseph Pugach, Thomas W. Smeal, Howard S. Karp
Patented Case
View Patent ↗
Granted: Mar 26, 1996
Filed: Jun 9, 1995
Inventors
Joseph Pugach
Thomas W. Smeal
Howard S. Karp
Assignee (at issue)
Aristech Chemical 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.