US2649889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube expanding
Assignee: Individual
•
Filing: 1948-03-30
•
Granted: 1953-08-25
•
Expires: 1968-03-30
Abstract
No abstract record available.
Inventors
- 👤 Frank E Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:51
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/10; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53113; Y10T29/53122; Y10T29/53978; Y10T29/53987
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE11901C
Cited
US350701A
Cited
US483920A
Cited
US548100A
Cited
US889242A
Cited
US1550135A
Cited
US1680922A
Cited
US1819915A
Cited
GB410709A
Cited
FR769073A
Cited
US2373097A
Cited
US2298703A
Cited
US2355852A
Cited
US2488512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |