Methane Drainage Ventures
Patent Applications and Registrations
Patent applications and USPTO patent grants for Methane Drainage Ventures.The latest application filed is for "process for recovering methane gas from subterranean coalseams".
- Methane Drainage Ventures - Placentia CA
| Patent | Date |
|---|---|
| Process for recovering methane gas from subterranean coalseams Grant 4,651,836 - Richards March 24, 1 | 1987-03-24 |
| Multiple level methane drainage method Grant 4,611,855 - Richards * September 16, 1 | 1986-09-16 |
| Process for production of oil and gas through horizontal drainholes from underground workings Grant 4,533,182 - Richards August 6, 1 | 1985-08-06 |
| Gas-liquid-solids separation system Grant 4,484,643 - Mahyera , et al. November 27, 1 | 1984-11-27 |
| Multiple level methane drainage shaft method Grant 4,452,489 - Richards June 5, 1 | 1984-06-05 |
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