US3473185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sludge treating and moving apparatus for dry beds of sewage plants
Assignee: Individual
•
Filing: 1967-08-30
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Granted: 1969-10-21
•
Expires: 1987-08-30
Abstract
No abstract record available.
Inventors
- 👤 Albert Bahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:20
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/12; C02F11/16; B; B01; B01D; B01D21/00; B01D21/18; B01D21/20; B01D21/24; B01D21/245; C02F1/00; C02F1/006
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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |