US2750135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for facilitating the loading and unloading of aircraft passengers and cargo at airports
Assignee: Whiting Corp
•
Filing: 1954-06-04
•
Granted: 1956-06-12
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:21
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/22; B64F1/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US909791A
Cited
US1149759A
Cited
US1902205A
Cited
US2204546A
Cited
GB597806A
Cited
US2542847A
Cited
US2476538A
Cited
US2487613A
Cited
US2644971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |