US2770432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parachute with rotating canopy
Assignee: NAT RES COUNEIL
•
Filing: 1953-11-09
•
Granted: 1956-11-13
•
Expires: 1973-11-09
Abstract
No abstract record available.
Inventors
- 👤 Stevinson Harry Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/02; B64D17/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US966143A
Cited
DE680483C
Cited
FR974099A
Cited
US2384416A
Cited
US2469573A
Cited
FR933149A
Cited
US2701697A
Cited
US2724567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |