Patent US2901114A successfully refreshed from Google Patents.
US2901114A
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Sewage treatment apparatus
Assignee: Individual
•
Filing: 1957-04-17
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Granted: 1959-08-25
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Arnold R Smith
- 👤 Walter T Mcphee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:48
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; C02F3/1247; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/208; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1996325A
Cited
US2013577A
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US2027370A
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US2228017A
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US2233218A
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US2337507A
Cited
US2430519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |