US2754764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch hydraulic screw pump
Assignee: Individual
•
Filing: 1952-06-25
•
Granted: 1956-07-17
•
Expires: 1972-06-25
Abstract
No abstract record available.
Inventors
- 👤 Mead Harold Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
F; F16; F16D; F16D33/00; F16D33/02; F16D33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675761A
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US913364A
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CH94287A
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US2178356A
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US2427458A
Cited
US2471179A
Cited
US2533148A
Cited
US2505071A
Cited
US2597527A
Cited
US2640680A
Cited
US2627164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |