DOE RUN COMPANY, THE

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ST. LOUIS, MO, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for the recovery of cobalt from ores containing metal sulfides
- Patent number 5,925,862
- Issue date Jul 20, 1999
- The Doe Run Company
- John C. Morrisey
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Two-sided lead composite and method of making same
- Patent number 5,122,408
- Issue date Jun 16, 1992
- The Doe Run Company
- Anthony W. Worcester
- B32 - LAYERED PRODUCTS
Information Patent Grant
Sequential and selective flotation of sulfide ores containing coppe...
- Patent number 5,078,860
- Issue date Jan 7, 1992
- The Doe Run Company
- Harold M. Ray
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
Information Patent Grant
Sequential and selective flotation of sulfide ores
- Patent number 5,074,994
- Issue date Dec 24, 1991
- The Doe Run Company
- Harold M. Ray
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
Information Patent Grant
Method of alloying aluminum and calcium into lead
- Patent number 4,808,376
- Issue date Feb 28, 1989
- The Doe Run Company
- Anthony W. Worcester
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

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