Patent US4326381A successfully refreshed from Google Patents.
US2584582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump or motor
Assignee: Individual
•
Filing: 1945-03-23
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Granted: 1952-02-05
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Expires: 1965-03-23
Abstract
No abstract record available.
Inventors
- 👤 Cleburne B Hatfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:52
CPC Classifications
F; F01; F01C; F01C3/00; F01C3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US6906A
Cited
US21632A
Cited
US45596A
Cited
US51713A
Cited
US517985A
Cited
US528493A
Cited
GB190004627A
Cited
US713301A
Cited
US1066413A
Cited
GB426675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |