Granted Patent
Utility
US 6,258,245 · App. 09/443,592
Copper leach process aids
Inventors:
Ricardo Arancibia Cifuentes, Donald Carroll Roe, Jorge Vergara Chavez, Andres Reghezza Inzunza
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Nov 19, 1999
Inventors
Ricardo Arancibia Cifuentes
Donald Carroll Roe
Jorge Vergara Chavez
Andres Reghezza Inzunza
Assignees (at issue)
Betzdearborn, Inc.
CORPORACION NACIONAL DEL COBRE DE CHILE
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.