Patent US2543480A successfully refreshed from Google Patents.
US2543480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy-duty hydraulic tube end forming machine with automatically operated chuck, punch, and stop means
Assignee: Individual
•
Filing: 1945-07-30
•
Granted: 1951-02-27
•
Expires: 1965-07-30
Abstract
No abstract record available.
Inventors
- 👤 John L Vaill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:28
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US410000A
Cited
US489439A
Cited
US774154A
Cited
US716217A
Cited
US818337A
Cited
US989805A
Cited
US1150040A
Cited
US1383840A
Cited
US1740792A
Cited
US1868094A
Cited
US1914235A
Cited
US1950154A
Cited
US1955356A
Cited
US2023657A
Cited
US2100939A
Cited
US2176188A
Cited
US2302115A
Cited
US2299105A
Cited
US2241807A
Cited
US2301028A
Cited
GB565662A
Cited
US2394841A
Cited
US2438999A
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 |