Inventor
HACKL RALPH PETER
CA15 patents
⚠️ This page may combine multiple inventors who share the name “HACKL RALPH PETER”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PLACER DOME TECHNICAL SERVICES
6 patentsUS6660059B2Dec 9, 2003
Method for thiosulfate leaching of precious metal-containing materials
PLACER DOME TECHNICAL SERVICES79 citations98
US7066983B2Jun 27, 2006
Method for thiosulfate leaching of precious metal-containing materials
PLACER DOME TECHNICAL SERVICES30 citations95
US7722840B2May 25, 2010
Method for thiosulfate leaching of precious metal-containing materials
PLACER DOME TECHNICAL SERVICES19 citations92
US7704298B2Apr 27, 2010
Method for thiosulfate leaching of precious metal-containing materials
PLACER DOME TECHNICAL SERVICES21 citations92
US7559974B2Jul 14, 2009
Method for thiosulfate leaching of precious metal-containing materials
PLACER DOME TECHNICAL SERVICES17 citations92
US7544232B2Jun 9, 2009
Method for thiosulfate leaching of precious metal-containing materials
PLACER DOME TECHNICAL SERVICES22 citations92
TECH RESOURCES PTY LTD
5 patentsUS10563287B2Feb 18, 2020
Leaching copper-containing ores
TECH RESOURCES PTY LTD8 citations79
US10526685B2Jan 7, 2020
Heap leaching
TECH RESOURCES PTY LTD2 citations69
US10563284B2Feb 18, 2020
Leaching copper-containing ores
TECH RESOURCES PTY LTD2 citations62
USRE50227EDec 3, 2024
Leaching copper-containing ores
TECH RESOURCES PTY LTD0 citations58
US12577634B2Mar 17, 2026
Microbial-assisted heap leaching
TECH RESOURCES PTY LTD0 citations54