Granted Patent
Utility
US 5,849,680 · App. 08/741,984
Cleaning with limonene, BHT, and acetylacetonate
Inventor:
Ching-Ping Wong
Patented Case
View Patent ↗
Granted: Dec 15, 1998
Filed: Oct 31, 1996
Inventor
Ching-Ping Wong
Assignee (at issue)
LUCENT TECHNOLOGIES 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.