Duncan Johnstone

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McLean, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Vertical membrane storage system and method of storing liquids usin...
- Patent number 6,726,846
- Issue date Apr 27, 2004
- Duncan Johnstone
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Vertical membrane storage system and method of storing liquids usin...
- Patent number 6,436,289
- Issue date Aug 20, 2002
- Duncan Johnstone
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL

Patents Applicationslast 30 patents

Information Patent Application
Vertical membrane storage system and method of storing liquids usin...
- Publication number 20020185438
- Publication date Dec 12, 2002
- Duncan Johnstone
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE