US2440762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete septic tank
Assignee: Individual
•
Filing: 1945-01-01
•
Granted: 1948-05-04
•
Expires: 1965-01-01
Abstract
No abstract record available.
Inventors
- 👤 Philip N Sitton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:24
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1877507A
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US1634871A
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US1677626A
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FR645510A
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US1742911A
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US2086154A
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GB524418A
Cited
US2279813A
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US2378616A
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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) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |