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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 |
| 4121663 |
Removing hydrogen sulfide from a gas |
Oct. 24, 1978 |
| 4121662 |
Water purification with fragmented oil shale |
Oct. 24, 1978 |
| 4120355 |
Method for providing fluid communication for in situ shale retort |
Oct. 17, 1978 |
| 4120354 |
Determining the locus of a processing zone in an in situ oil shale retort by pressure monitoring |
Oct. 17, 1978 |
| 4119345 |
In situ oil shale retorting process using introduction of gas at an intermediate location |
Oct. 10, 1978 |
| 4119349 |
Method and apparatus for recovery of fluids produced in in-situ retorting of oil shale |
Oct. 10, 1978 |
| 4117886 |
Oil shale retorting and off-gas purification |
Oct. 3, 1978 |
| 4118070 |
Subterranean in situ oil shale retort and method for making and operating same |
Oct. 3, 1978 |
| 4118071 |
In situ oil shale retort with a horizontal sill pillar |
Oct. 3, 1978 |
| 4116273 |
Induction heating of coal in situ |
Sep. 26, 1978 |
| 4109964 |
Method for preconditioning oil shale preliminary to explosive expansion and in situ retorting thereof |
Aug. 29, 1978 |
| 4109719 |
Method for creating a permeable fragmented zone within a subterranean carbonaceous deposit for in situ coal gasification |
Aug. 29, 1978 |
| 4109718 |
Method of breaking shale oil-water emulsion |
Aug. 29, 1978 |
| 4106814 |
Method of forming in situ oil shale retorts |
Aug. 15, 1978 |
| 4105251 |
Dispersion of catalysts with explosives for in situ mining of carbonaceous minerals |
Aug. 8, 1978 |
| 4105072 |
Process for recovering carbonaceous values from post in situ oil shale retorting |
Aug. 8, 1978 |
| 4102397 |
Sealing an underground coal deposit for in situ production |
Jul. 25, 1978 |
| 4101172 |
In-situ methods of extracting bitumen values from oil-sand deposits |
Jul. 18, 1978 |
| 4099783 |
Method for thermoshaft oil production |
Jul. 11, 1978 |
| 4093026 |
Removal of sulfur dioxide from process gas using treated oil shale and water |
Jun. 6, 1978 |
| 4093310 |
Sealing an underground coal deposit for in situ production |
Jun. 6, 1978 |
| 4092052 |
Converting underground coal fires into commercial products |
May. 30, 1978 |
| 4089375 |
In situ retorting with water vaporized in situ |
May. 16, 1978 |
| 4086962 |
Decreasing hydrogen sulfide concentration of a gas |
May. 2, 1978 |
| 4087130 |
Process for the gasification of coal in situ |
May. 2, 1978 |
| 4086963 |
Method of oxidizing hydrogen sulfide |
May. 2, 1978 |
| 4082146 |
Low temperature oxidation of hydrogen sulfide in the presence of oil shale |
Apr. 4, 1978 |
| 4082145 |
Determining the locus of a processing zone in an in situ oil shale retort by sound monitoring |
Apr. 4, 1978 |
| 4076311 |
Hydraulic mining from tunnel by reciprocated pipes |
Feb. 28, 1978 |
| 4076312 |
Method and apparatus for retorting oil shale at subatmospheric pressure |
Feb. 28, 1978 |
| RE29553 |
Oil shale retort flue gas cooling and cleaning |
Feb. 28, 1978 |
| 4072350 |
Multi-stage method of operating an in situ oil shale retort |
Feb. 7, 1978 |
| 4069867 |
Cyclic flow underground coal gasification process |
Jan. 24, 1978 |
| 4067390 |
Apparatus and method for the recovery of fuel products from subterranean deposits of carbonaceous matter using a plasma arc |
Jan. 10, 1978 |
| 4063780 |
Method of recovering liquid and gaseous products of oil shale |
Dec. 20, 1977 |
| 4057293 |
Process for in situ conversion of coal or the like into oil and gas |
Nov. 8, 1977 |
| 4047760 |
In situ recovery of shale oil |
Sep. 13, 1977 |
| 4045085 |
Fracturing of pillars for enhancing recovery of oil from in situ oil shale retort |
Aug. 30, 1977 |
| 4043595 |
In situ recovery of shale oil |
Aug. 23, 1977 |
| 4043598 |
Multiple zone preparation of oil shale retort |
Aug. 23, 1977 |
| 4043597 |
Multiple level preparation of oil shale retort |
Aug. 23, 1977 |
| 4043596 |
Forming shale oil recovery retort by blasting into slot-shaped columner void |
Aug. 23, 1977 |
| 4029360 |
Method of recovering oil and water from in situ oil shale retort flue gas |
Jun. 14, 1977 |
| 4027917 |
Method for igniting the top surface of oil shale in an in situ retort |
Jun. 7, 1977 |
| 4025115 |
Method of enhancing recovery of oil from pillars adjacent in situ oil shaft retort |
May. 24, 1977 |
| 4022511 |
Recovery of liquid and gaseous products from an in situ oil shale retort |
May. 10, 1977 |
| 4018280 |
Process for in situ retorting of oil shale |
Apr. 19, 1977 |
| 4017119 |
Method for rubblizing an oil shale deposit for in situ retorting |
Apr. 12, 1977 |
| 4015664 |
Shale oil recovery process |
Apr. 5, 1977 |
| 4014575 |
System for fuel and products of oil shale retort |
Mar. 29, 1977 |
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