Patent US2636457A successfully refreshed from Google Patents.
US2636457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible truss structure
Assignee: Boeing Co
•
Filing: 1950-08-22
•
Granted: 1953-04-28
•
Expires: 1970-08-22
Abstract
No abstract record available.
Inventors
- 👤 Donald W Finlay
- 👤 Otto D Rohlfs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:09
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/20; E04H2015/202; E04H2015/205
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US511472A
Cited
FR709532A
Cited
US2352526A
Cited
US2333136A
Cited
US2323106A
Cited
US2411316A
Cited
US2477394A
Cited
US2494680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |