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Class Information
Number: 299/2
Name: Mining or in situ disintegration of hard material > Tunnel recovery of fluid material
Description: Process or apparatus comprising recovering valuable material in the fluid state from the earth and including (1) process steps involving the construction or use of a horizontal passage in which a human may work or (2) the structure of a horizontal passage in which a human may work.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4007963 |
Oil collection and recovery system for in situ oil shale retort |
Feb. 15, 1977 |
| 4005752 |
Method of igniting in situ oil shale retort with fuel rich flue gas |
Feb. 1, 1977 |
| 3994343 |
Process for in situ oil shale retorting with off gas recycling |
Nov. 30, 1976 |
| 3980339 |
Process for recovery of carbonaceous materials from subterranean deposits |
Sep. 14, 1976 |
| 3957305 |
In situ values extraction |
May. 18, 1976 |
| 3951456 |
Process for effecting even retort working fluid flow throughout an in situ retort containing carbonaceous deposits |
Apr. 20, 1976 |
| 3950029 |
In situ retorting of oil shale |
Apr. 13, 1976 |
| 3941421 |
Apparatus for obtaining uniform gas flow through an in situ oil shale retort |
Mar. 2, 1976 |
| 3934935 |
Hydraulic mining of oil bearing formation |
Jan. 27, 1976 |
| 3933447 |
Underground gasification of coal |
Jan. 20, 1976 |
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