Patent US2760438A successfully refreshed from Google Patents.
US2760438A
Expired / Lapsed
US
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Extra capacity displacement pump
Assignee: Individual
•
Filing: 1955-01-03
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Granted: 1956-08-28
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Expires: 1975-01-03
Abstract
No abstract record available.
Inventors
- 👤 Francis A Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:32
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/08; F16H2055/0893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US931899A
Cited
GB223257A
Cited
US1833993A
Cited
US1787543A
Cited
DE554749C
Cited
US2601288A
Cited
US2696170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |