US3412412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft loading and unloading ramp with pivotable outer passageway
Assignee: Stanray Corp
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Filing: 1966-01-27
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Granted: 1968-11-26
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Expires: 1986-01-27
Abstract
No abstract record available.
Inventors
- 👤 Hans F Kjerulf
- 👤 Harry L Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:52
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/30; B64F1/305; B64F1/3055
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |