Granted Patent
Utility
US 6,834,720 · App. 10/309,502
Method and apparatus for injecting particulate media into the ground
Inventors:
Brian Dwyer, Stephen Dwyer, Francine S. Vigil, Willis E. Stewart
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: Dec 3, 2002
Inventors
Brian Dwyer
Stephen Dwyer
Francine S. Vigil
Willis E. Stewart
Assignee (at issue)
Sandia Corporation
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.