Granted Patent
Utility
US 6,657,021 · App. 10/221,861
Liquid nozzle with variable liquid level
Inventors:
Jean-Louis Chamayou, Jean-Claude Chinh
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: Dec 26, 2002
Inventors
Jean-Louis Chamayou
Jean-Claude Chinh
Assignee (at issue)
BP Chemicals Limited
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.