US2446692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural member
Assignee: Carnegie Illinois Steel Corp
•
Filing: 1944-07-26
•
Granted: 1948-08-10
•
Expires: 1964-07-26
Abstract
No abstract record available.
Inventors
- 👤 Collins Tappan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:37
CPC Classifications
B; B23; B23K; B23K33/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49634; Y10T428/00; Y10T428/12; Y10T428/12375
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE136268C
Cited
US665873A
Cited
US899033A
Cited
FR627491A
Cited
US1933253A
Cited
US2108373A
Cited
US2163209A
Cited
US2239202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |