METHANE DRAINAGE VENTURES, A CA PARTNERSHIP

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PLACENTIA, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for establishing a clear horizontal borehole in a subterran...
- Patent number 4,691,789
- Issue date Sep 8, 1987
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING
Information Patent Grant
Production and grout liner for methane drainage in subterranean bor...
- Patent number 4,687,060
- Issue date Aug 18, 1987
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING
Information Patent Grant
Process for recovering methane gas from subterranean coalseams
- Patent number 4,651,836
- Issue date Mar 24, 1987
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING
Information Patent Grant
In-shaft drilling apparatus for recovery of gas from subterranean f...
- Patent number 4,624,328
- Issue date Nov 25, 1986
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multiple level methane drainage method
- Patent number 4,611,855
- Issue date Sep 16, 1986
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING
Information Patent Grant
In-shaft drilling method for recovery of gas from subterranean form...
- Patent number 4,600,061
- Issue date Jul 15, 1986
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING
Information Patent Grant
Process for production of oil and gas through horizontal drainholes...
- Patent number 4,533,182
- Issue date Aug 6, 1985
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING
Information Patent Grant
Gas-liquid-solids separation system
- Patent number 4,484,643
- Issue date Nov 27, 1984
- Methane Drainage Ventures
- Anil Mahyera
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multiple level methane drainage shaft method
- Patent number 4,452,489
- Issue date Jun 5, 1984
- Methane Drainage Ventures
- Walter L. Richards
- E21 - EARTH DRILLING MINING

METHANE DRAINAGE VENTURES, A CA PARTNERSHIP

Organization

Patents Grantslast 30 patents

Process for establishing a clear horizontal borehole in a subterran...

Production and grout liner for methane drainage in subterranean bor...

Process for recovering methane gas from subterranean coalseams

In-shaft drilling apparatus for recovery of gas from subterranean f...

Multiple level methane drainage method

In-shaft drilling method for recovery of gas from subterranean form...

Process for production of oil and gas through horizontal drainholes...

Gas-liquid-solids separation system

Multiple level methane drainage shaft method

Patents Applicationslast 30 patents

Trademarklast 30 trademarks