US2642825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable and compactable truss and stud support
Assignee: COPCO STEEL AND ENGINEERING Co
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Filing: 1951-11-01
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Granted: 1953-06-23
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Expires: 1971-11-01
Abstract
No abstract record available.
Inventors
- 👤 Charles A Mcelhone
- 👤 Thomas G Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:58
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/343; E04B1/344; E04B1/3441
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |