US3017138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for moving loads with combination helicopter and balloon
Assignee: WORLD WIDE HELICOPTERS Inc
•
Filing: 1958-03-05
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Granted: 1962-01-16
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Expires: 1978-03-05
Abstract
No abstract record available.
Inventors
- 👤 Knute W Flint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:49
CPC Classifications
B; B64; B64C; B64C37/00; B64C37/02; B64B; B64B1/00; B64B1/40; B64C27/00; B64C27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1247974A
Cited
US1563571A
Cited
US2398744A
Cited
US2704192A
Cited
US2730398A
Cited
GB748059A
Cited
US2904285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |