Patent US4013882A successfully refreshed from Google Patents.
US3510001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation chamber for cleaning sewage and the like
Assignee: Individual
•
Filing: 1965-06-25
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Granted: 1970-05-05
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Erhardt Baer
- 👤 Kurt Xylander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:41
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/465; C02F1/52; C02F1/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |