Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6119778 | Method for recovering methane from a solid carbonaceous subterranean formation | John P. Seidle, Dan Yee | 2000-09-19 |
| 5566755 | Method for recovering methane from a solid carbonaceous subterranean formation | John P. Seidle, Dan Yee | 1996-10-22 |
| 5566756 | Method for recovering methane from a solid carbonaceous subterranean formation | Joseph J. Chaback, Dan Yee, Richard F. Volz, Jr., John P. Seidle | 1996-10-22 |
| 5501273 | Method for determining the reservoir properties of a solid carbonaceous subterranean formation | — | 1996-03-26 |
| 5439054 | Method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation | Joseph J. Chaback, Dan Yee, Richard F. Volz, Jr., John P. Seidle | 1995-08-08 |
| 5388641 | Method for reducing the inert gas fraction in methane-containing gaseous mixtures obtained from underground formations | Dan Yee, John P. Seidle | 1995-02-14 |
| 5388640 | Method for producing methane-containing gaseous mixtures | Dan Yee | 1995-02-14 |
| 5388642 | Coalbed methane recovery using membrane separation of oxygen from air | Dan Yee | 1995-02-14 |
| 5388643 | Coalbed methane recovery using pressure swing adsorption separation | Dan Yee | 1995-02-14 |
| 5388645 | Method for producing methane-containing gaseous mixtures | Paul T. Pendergraft | 1995-02-14 |
| 5133406 | Generating oxygen-depleted air useful for increasing methane production | — | 1992-07-28 |
| 5099921 | Recovery of methane from solid carbonaceous subterranean formations | Dan Yee, Robert S. Metcalfe | 1992-03-31 |
| 5085274 | Recovery of methane from solid carbonaceous subterranean of formations | Dan Yee | 1992-02-04 |
| 5048328 | Method of determining the porosity and irreducible water saturation of a coal cleat system | — | 1991-09-17 |
| 5014785 | Methane production from carbonaceous subterranean formations | Michael Stein | 1991-05-14 |
| 5014788 | Method of increasing the permeability of a coal seam | Dan Yee, Thomas S. Buxton, Om Majahan | 1991-05-14 |
| 4883122 | Method of coalbed methane production | Michael Stein | 1989-11-28 |
| 4756367 | Method for producing natural gas from a coal seam | Dan Yee, John P. Seidle | 1988-07-12 |
| 4662439 | Method of underground conversion of coal | — | 1987-05-05 |
| 4662443 | Combination air-blown and oxygen-blown underground coal gasification process | Luis E. Arri, Bruce W. Gash | 1987-05-05 |
| 4614234 | Method of recovering coal values by combining underground coal gasification with surface coal liquefaction | — | 1986-09-30 |
| 4537252 | Method of underground conversion of coal | — | 1985-08-27 |