Patent US2647733A successfully refreshed from Google Patents.
US2647733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agitator device for digester tanks
Assignee: Dorr Co
•
Filing: 1952-05-29
•
Granted: 1953-08-04
•
Expires: 1972-05-29
Abstract
No abstract record available.
Inventors
- 👤 John H Knowles
- 👤 William G Sutcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:58
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/2866; C02F3/2873; B; B01; B01F; B01F35/00; B01F35/30; B01F35/32; B01F35/321; B01F35/3214; B01F35/40; B01F35/41; B01F35/411; B01F35/4111
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1175147A
Cited
US1418295A
Cited
US2054295A
Cited
US2063301A
Cited
US2318181A
Cited
US2293183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |