Granted Patent
Utility
US 6,802,978 · App. 10/167,089
Process for environmental recovery in urban regions
Inventors:
João Carlos Gomes De Oliveira, Elizabeth Maniero Gomes de Oliveira
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Jun 10, 2002
Inventors
João Carlos Gomes De Oliveira
Elizabeth Maniero Gomes de Oliveira
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.