Patent US2907303A successfully refreshed from Google Patents.
Patent US3029048A successfully refreshed from Google Patents.
US3029048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter
Assignee: Individual
•
Filing: 1959-09-28
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Granted: 1962-04-10
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Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 Brooks Earnest
- 👤 John P Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:33
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/24; B64C13/26; B64C13/28; B64C13/30; B64C1/00; B64C1/06; B64C25/00; B64C25/32; B64C25/52; B64C27/00; B64C27/04; B64C27/12; B64C27/22; B64C27/30; B64C2025/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |