US2610708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building framework
Assignee: National Steel Corp
•
Filing: 1946-06-17
•
Granted: 1952-09-16
•
Expires: 1966-06-17
Abstract
No abstract record available.
Inventors
- 👤 Harold S Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:11
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/24; E04B1/2403; E04B2001/2454; E04B2001/2463
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US844179A
Cited
US1857326A
Cited
US1864206A
Cited
US1988388A
Cited
US2003670A
Cited
US2380692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |