Patent US3817859A successfully refreshed from Google Patents.
US3817859A
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Waste water treatment method
Assignee: Texaco Inc
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Filing: 1972-03-29
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Granted: 1974-06-18
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Expires: 1992-03-29
Abstract
Abstract A METHOD OF DISPOSING OF CERTAIN PROCESS EFFLUENT WASTE STREAMS BY INJECTING THEM INTO SUBSTERRANEAN FORMATIONS WHICH ENTAILS INHIBITING THE FORMATION OF SOLID PRECIPITATES WHICH PLUG THE SUBTERRANEAN FORMATION. THE METHOD OF INHIBITING THE FORMATION OF PRECIPITATES INVOLVES LOWERING THE PH OF THE MIXED STREAMS AND OPTIONALLY REMOVING ANY ORGANIC PHASE CREATED THEREBY BEFORE INJECTION.
Inventors
- 👤 J Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:11
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/005; C; C02; C02F; C02F5/00; C02F5/08; C09; C09K; C09K8/00; C09K8/52; C09K8/528
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |