Deep Shaft Technology Inc.

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Galgary, CA

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Patents Grantslast 30 patents

Information Patent Grant
Multi-pressure head tank for use with vertical shaft bioreactors
- Patent number 5,660,724
- Issue date Aug 26, 1997
- Deep Shaft Technology Inc.
- David C. Pollock
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Biodegradeable effluent nutrient removal
- Patent number 5,651,892
- Issue date Jul 29, 1997
- Deep Shaft Technology Inc.
- David C. Pollock
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Aerobic long vertical shaft bioreactors
- Patent number 5,650,070
- Issue date Jul 22, 1997
- Deep Shaft Technology Inc.
- David C. Pollock
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Treatment of waste liquor in a vertical shaft bioreactor
- Patent number 5,645,726
- Issue date Jul 8, 1997
- Deep Shaft Technology Inc.
- David C. Pollock
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Method and apparatus for developing shafts using small diameter shafts
- Patent number 5,513,903
- Issue date May 7, 1996
- Deep Shaft Technology, Inc.
- Dennis Mraz
- E21 - EARTH DRILLING MINING