US2543007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube expander
Assignee: Individual
•
Filing: 1945-08-01
•
Granted: 1951-02-27
•
Expires: 1965-08-01
Abstract
No abstract record available.
Inventors
- 👤 Frank P Fitzgerald
- 👤 Albert F Stieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:40
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1322921A
Cited
US648765A
Cited
US1015447A
Cited
US1077837A
Cited
US1138311A
Cited
US1265283A
Cited
US1357059A
Cited
US1417979A
Cited
US1819915A
Cited
US1921810A
Cited
US1942612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |