US2650810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for raising and lowering diffuser tubes
Assignee: Individual
•
Filing: 1951-01-27
•
Granted: 1953-09-01
•
Expires: 1971-01-27
Abstract
No abstract record available.
Inventors
- 👤 Carl H Nordell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:47
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2311; B01F23/23114; B01F23/231143; B01F23/2312; B01F23/23123; B01F23/23125; B01F23/23126; B01F23/231265; C02F3/203; B01F23/231142; B01F23/23116; B01F23/231268; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US725786A
Cited
US839404A
Cited
US1003302A
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AU459331A
Cited
US2144385A
Cited
US2454675A
Cited
US2555201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |