US2898970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping tubular expander and cylindrical pilot for expanding metal tubing in situ when end of tubing is clamped around inserted pilot
Assignee: Individual
•
Filing: 1957-07-29
•
Granted: 1959-08-11
•
Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Nate E Testo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:31
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US389441A
Cited
US2303061A
Cited
US1746280A
Cited
US2365834A
Cited
US2377406A
Cited
US2493127A
Cited
US2562419A
Cited
US2614318A
Cited
US2780272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |