US2547870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe-bending apparatus
Assignee: Individual
•
Filing: 1947-12-04
•
Granted: 1951-04-03
•
Expires: 1967-12-04
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Kelso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:31
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/02; B21D7/022; B21D7/0225
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US174609A
Cited
US1079442A
Cited
US1531653A
Cited
US1741840A
Cited
US1847943A
Cited
GB505866A
Cited
US2347593A
Cited
US2428764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |