US2990920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural building elements
Assignee: Republic Steel Corp
•
Filing: 1958-01-21
•
Granted: 1961-07-04
•
Expires: 1978-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank A Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:17
CPC Classifications
A; A47; A47B; A47B96/00; A47B96/14; A47B96/1408; Y; Y10; Y10T; Y10T403/00; Y10T403/44; Y10T403/447
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |