US3628607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil spill removal method
Assignee: Shell USA Inc
•
Filing: 1970-05-07
•
Granted: 1971-12-21
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Expires: 1990-05-07
Abstract
Abstract Taste-spoiling components of oil spilled in a drinking water catchment area are removed from the aquifer by supplying liquid such as water or tasteless oil to the spill area and recovering the liquid together with the undesired components via an auxiliary well.
Inventors
- 👤 Daniel N Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:55
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; B; B09; B09C; B09C1/00; B09C1/002; B09C1/02; B09C1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
The method of claim 1 wherein the washing liquid supplied to the surface of the soil is water.
Claim 2
Dependent Claim
17 words
The method of claim 1 wherein the washing liquid supplied to the soil is a paraffinic oil.
References Cited (Backward Citations)
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US634015A
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US842696A
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US1286666A
Cited
US1342679A
Cited
US2607426A
Cited
US3195633A
Cited
US3202215A
Cited
US3199592A
Cited
US3342135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |