US2517792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for treatment of sewage
Assignee: Individual
•
Filing: 1944-04-10
•
Granted: 1950-08-08
•
Expires: 1964-04-10
Abstract
No abstract record available.
Inventors
- 👤 Leon S Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:25
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/30; C02F3/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1743550A
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US1982246A
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US1986332A
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US2089162A
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US1999973A
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US2137966A
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US2077498A
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US2228017A
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US2118266A
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US2348126A
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US2359004A
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US2404223A
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US2458163A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |