US2468865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment
Assignee: Individual
•
Filing: 1945-12-29
•
Granted: 1949-05-03
•
Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 John J Campobasso
- 👤 Warren M Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:49
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/24; C02F1/00; C02F1/72; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB190911639A
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US938075A
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US1047534A
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US1522907A
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US1420046A
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US1573079A
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US1964487A
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US1943890A
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US2114601A
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US2090405A
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US2141979A
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US2308866A
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US2311830A
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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) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |