Patent US4702545A successfully refreshed from Google Patents.
US2636720A
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US
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Agitating impeller
Assignee: Allis Chalmers Corp
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Filing: 1947-11-03
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Granted: 1953-04-28
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Expires: 1967-11-03
Abstract
No abstract record available.
Inventors
- 👤 Frank R Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:21
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/0852; F16D1/0864; B; B01; B01F; B01F27/00; B01F27/05; B01F27/07; B01F27/071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US109458A
Cited
US1634329A
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US888575A
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US1862328A
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US1836700A
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US1870401A
Cited
US2151216A
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US2234120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |