Granted Patent
Utility
US 6,609,434 · App. 10/040,021
Method of retrieving a liquid sample, a suction lysimeter, a portable suction lysimeter, a lysimeter system, and a deep lysimeter
Inventors:
Joel M. Hubbell, James B. Sisson
Patented Case
View Patent ↗
Granted: Aug 26, 2003
Filed: Jan 3, 2002
Inventors
Joel M. Hubbell
James B. Sisson
Assignee (at issue)
Department of Energy
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.