Weir; Donald R.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Weir; Donald R..The latest application filed is for "co.sub.2 -induced in-situ gelation of polymeric viscosifiers for permeability contrast correction".

Company Profile

0.15.0

Weir; Donald R. - Borger TX
Weir; Donald R. - Fort Saskatchewan CA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for permeability contrast correction Grant 4,657,944 - Bruning , et al. April 14, 1	1987-04-14
Process for the recovery of silver from a residue essentially free of elemental sulphur Grant 4,632,701 - Genik-Sas-Berezowsky , et al. December 30, 1	1986-12-30
Recovery of gold from refractory auriferous iron-containing sulphidic material Grant 4,610,724 - Weir , et al. September 9, 1	1986-09-09
Process for the pressure oxidation acid leaching of non-ferrous metal and iron-containing sulphidic material Grant 4,606,763 - Weir August 19, 1	1986-08-19
Process for separately recovering gold and silver from solution by carbon adsorption Grant 4,606,766 - Genik-Sas-Berezowsky , et al. August 19, 1	1986-08-19
Recovery of gold from refractory auriferous iron-containing sulphidic material Grant 4,605,439 - Weir August 12, 1	1986-08-12
Recovery of cobalt and nickel from sulphidic material Grant 4,594,102 - Weir , et al. June 10, 1	1986-06-10
Recovery of gold from refractory auriferous iron-containing sulphidic ore Grant 4,571,264 - Weir , et al. February 18, 1	1986-02-18
Recovery of gold from refractory auriferous iron-containing sulphidic concentrates Grant 4,571,263 - Weir , et al. February 18, 1	1986-02-18
Recovery of platinum group metals from nickel-copper-iron matte Grant 4,571,262 - Kerfoot , et al. February 18, 1	1986-02-18
Recovery of zinc from zinc containing sulphidic material Grant 4,505,744 - Weir , et al. March 19, 1	1985-03-19
Removal of arsenic from aqueous solutions Grant 4,366,128 - Weir , et al. December 28, 1	1982-12-28
Removal of selenium (IV) and (VI) from acidic copper sulphate solutions Grant 4,330,508 - Weir , et al. May 18, 1	1982-05-18
Treatment of dissolved basic nickel carbonate to obtain nickel Grant 4,148,632 - Seibt , et al. April 10, 1	1979-04-10
Production Of Nickel Powder From Impure Nickel Compounds Grant 3,816,098 - Mackiw , et al. June 11, 1	1974-06-11

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