US2521628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for stamping metal blanks
Assignee: Carnegie Illinois Steel Corp
•
Filing: 1948-04-08
•
Granted: 1950-09-05
•
Expires: 1968-04-08
Abstract
No abstract record available.
Inventors
- 👤 Roscoe C Britton
- 👤 Mcewan William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:23
CPC Classifications
B; B23; B23D; B23D25/00; B23D25/02; B23D25/04; B21; B21D; B21D22/00; B21D22/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US933733A
Cited
US1241261A
Cited
US1288082A
Cited
US1359807A
Cited
US1860729A
Cited
US2317861A
Cited
US2408516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |