Granted Patent
Utility
US 5,308,497 · App. 07/937,334
Method of absorbing petroleum-based products
Inventors:
Raymond T. O'Donnell, Melvin J. Schaub
Patented Case
View Patent ↗
Granted: May 3, 1994
Filed: Aug 31, 1992
Inventors
Raymond T. O'Donnell
Melvin J. Schaub
Assignee (at issue)
United Technologies Automotive
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.