US3593790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing shale oil from an oil shale formation
Assignee: Shell USA Inc
•
Filing: 1969-01-02
•
Granted: 1971-07-20
•
Expires: 1989-01-02
Abstract
Abstract A method for producing shale oil from a permeable zone formed within a subterranean oil shale formation by circulating through a well borehole in contact with said permeable zone a fluid containing at least one phenolic compound.
Inventors
- 👤 John A Herce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:05
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/592
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
14 words
The method of claim 1, wherein the Bronsted acid is a monomeric phenolic compound.
Claim 2
Dependent Claim
20 words
The method of claim 2 wherein the monomeric phenolic compound comprises about 10 percent by volume of the circulating fluid.
Claim 3
Dependent Claim
39 words
The method of claim 2 wherein the step of circulating a fluid containing at least one phenolic compound therein includes the step of introducing said phenolic compound continuously into said permeable zone while said fluid is being circulated therethrough.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the circulating fluid is water containing phenol.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the circulating fluid is an oil-miscible fluid containing phenol.
References Cited (Backward Citations)
US2267548A
Cited
US2288857A
Cited
US2365591A
Cited
US2859818A
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US3241611A
Cited
US3221813A
Cited
US3358756A
Cited
US3322194A
Cited
US3392105A
Cited
US3465819A
Cited
US3474863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |