Douglas Scott de Lange

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East Grand Rapids, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Gravity recovery system and method for recovery of heavy metals fro...
- Patent number 9,636,690
- Issue date May 2, 2017
- Douglas S. De Lange
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Gravity recovery system and method for recovery of heavy metals fro...
- Patent number 9,399,225
- Issue date Jul 26, 2016
- Douglas Scott de Lange
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
Information Patent Grant
Gravity recovery system and method for recovery of heavy metals fro...
- Patent number 9,114,403
- Issue date Aug 25, 2015
- Douglas Scott de Lange
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...

Patents Applicationslast 30 patents

Information Patent Application
GRAVITY RECOVERY SYSTEM AND METHOD FOR RECOVERY OF HEAVY METALS FRO...
- Publication number 20160332167
- Publication date Nov 17, 2016
- DOUGLAS S. DE LANGE
- B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...