US3677935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of sewage
Assignee: United States Atomic Energy Commission
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Filing: 1964-05-04
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Granted: 1972-07-18
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Expires: 1984-05-04
Abstract
Abstract A METHOD OF TREATING SEWAGE BY IRRADIATIONG IT WITH 10**3 TO 10**6 RAD OF IONIZING RADIATION FROM X-RAY OR GAMMA RAY SOURCES, THEREBY INCREASING THE SEDIMENTATION RATE OF THE SEWAGE AND DEGRADING ORGANIC SEWAGE COMPONENTS, ESPECIALLY SYNTHETIC DETERGENTS. RADIOACTIVE ISOTOPES ARE THE PREFERRED SOURCES OF THE IONIZING RADIATION.
Inventors
- 👤 Hal R Spragg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:17
CPC Classifications
G; G21; G21K; G21K5/00; G21K5/02; C; C02; C02F; C02F1/00; C02F1/30
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |