Granted Patent
Utility
US 6,540,919 · App. 10/107,614
Method of treating waste-activated sludge using electroporation
Inventors:
Jeffry Held, Satya P. Chauhan
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Mar 26, 2002
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.