US2501559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial delivery apparatus
Assignee: Individual
•
Filing: 1946-07-03
•
Granted: 1950-03-21
•
Expires: 1966-07-03
Abstract
No abstract record available.
Inventors
- 👤 Otto C Winzen
- 👤 Vera H Winzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:26
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB129017A
Cited
US1709264A
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GB278695A
Cited
US1755414A
Cited
US1793729A
Cited
FR726543A
Cited
US2118603A
Cited
US2365445A
Cited
US2382442A
Cited
GB585265A
Cited
US2400165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |