Granted Patent
Utility
US 6,491,820 · App. 09/998,651
Method for the molecular destruction of waste-activated sludge using high electrical voltage
Inventors:
Jeffry Held, Satya P. Chauhan
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Dec 3, 2001
Inventors
Jeffry Held
Satya P. Chauhan
Assignee (at issue)
DH20, L.L.C.
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.