US2420666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydro-pneumatic recuperator for guns
Assignee: Individual
•
Filing: 1941-09-12
•
Granted: 1947-05-20
•
Expires: 1961-09-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Joy
- 👤 Dayton A Gurney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
F; F41; F41A; F41A25/00; F41A25/16; F41A25/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR754307A
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GB189617403A
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US713691A
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FR319617A
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US1436144A
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US1622892A
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US1729565A
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US1956668A
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US2105160A
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GB478591A
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US2260850A
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US2290337A
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US2319460A
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US2278688A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |