Patent US5122056A successfully refreshed from Google Patents.
US2557579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold pipe bender
Assignee: TATE T STRINGFIELD
•
Filing: 1948-11-08
•
Granted: 1951-06-19
•
Expires: 1968-11-08
Abstract
No abstract record available.
Inventors
- 👤 Luther T Stringfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:34
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/02; B21D7/022
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US397712A
Cited
US1324940A
Cited
US790600A
Cited
US1042112A
Cited
US1299583A
Cited
GB126512A
Cited
US1610201A
Cited
US1795188A
Cited
US1849181A
Cited
US2055955A
Cited
US2444719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |