Hydrochem Developments Ltd.

Also on record

Records under this name other than patents Hydrochem Developments Ltd. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 7 of 7 · Back to Hydrochem Developments Ltd.

Patent	Title	Status	Expires	Confidence
US 4,545,901	Liquid-liquid extraction process Term ended Term ended no later than Oct 8, 2005 · Low confidence	Term ended	Term ended no later than Oct 8, 2005	Low confidence
US 4,670,051	Oxidation process for releasing metal values in which nitric acid is regenerated in situ Term ended Term ended no later than Jun 2, 2007 · Low confidence	Term ended	Term ended no later than Jun 2, 2007	Low confidence
US 4,750,994	Flotation apparatus Term ended Term ended no later than Jun 14, 2008 · Low confidence	Term ended	Term ended no later than Jun 14, 2008	Low confidence
US 4,834,793	Oxidation process for releasing metal values in which nitric acid is regenerated in situ Term ended Term ended no later than May 30, 2009 · Low confidence	Term ended	Term ended no later than May 30, 2009	Low confidence
US 4,878,677	Shut off seal about a shaft of a device having a side entry into a tank Formerly held Term ended Term ended no later than Nov 7, 2009 · Low confidence	Term ended	Term ended no later than Nov 7, 2009	Low confidence
US 5,013,359	Process for recovering gold from refractory sulfidic ores Term ended Term ended no later than May 7, 2011 · Low confidence	Term ended	Term ended no later than May 7, 2011	Low confidence
US 5,509,535	Flotation apparatus Term ended Term ended no later than Apr 23, 2016 · Low confidence	Term ended	Term ended no later than Apr 23, 2016	Low confidence