Granted Patent
Utility
US 5,360,562 · App. 08/032,821
Ashless or low-ash synthetic base compositions and additives therefor
Inventors:
Douglas R. Chrisope, Rolfe J. Hartley
Patented Case
View Patent ↗
Granted: Nov 1, 1994
Filed: Mar 15, 1993
Inventors
Douglas R. Chrisope
Rolfe J. Hartley
Assignee (at issue)
Ethyl Petroleum Additives, Inc.
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.