US2644656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parachute, including a regulated air passage
Assignee: Individual
•
Filing: 1951-06-18
•
Granted: 1953-07-07
•
Expires: 1971-06-18
Abstract
No abstract record available.
Inventors
- 👤 Peter W Zbock
- 👤 Zbock Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:34
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/22; B64D17/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE224522C
Cited
US1289703A
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US1475304A
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US1522715A
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US1535405A
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US2181611A
Cited
US2490232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |