Granted Patent
Utility
US 4,618,399 · App. 06/598,473
Wobble tube evaporator with whip rod fluid distributor
Inventor:
Yao Li
Patented Case
View Patent ↗
Granted: Oct 21, 1986
Filed: Apr 9, 1984
Inventor
Yao Li
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.