US2611489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skimmer mechanism for clarifiers
Assignee: Dorr Co
•
Filing: 1951-02-21
•
Granted: 1952-09-23
•
Expires: 1971-02-21
Abstract
No abstract record available.
Inventors
- 👤 Charles H Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:02
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/10; B01D21/12; B01D21/14; B01D21/24; B01D21/2427; B01D21/2433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1662703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |