US2523723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cargo ramp
Assignee: Boeing Co
•
Filing: 1946-12-06
•
Granted: 1950-09-26
•
Expires: 1966-12-06
Abstract
No abstract record available.
Inventors
- 👤 Edwin M Santee
- 👤 Ralph H Burkhard
- 👤 William J Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:51
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE309065C
Cited
FR383864A
Cited
US963918A
Cited
GB243628A
Cited
FR718231A
Cited
US2121121A
Cited
GB513598A
Cited
US2190708A
Cited
US2215631A
Cited
US2402283A
Cited
US2425972A
Cited
US2424862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |