US2877675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for swaging flanges on tubular members
Assignee: AT&T Inc
•
Filing: 1954-11-17
•
Granted: 1959-03-17
•
Expires: 1974-11-17
Abstract
No abstract record available.
Inventors
- 👤 Corheels Theophile
- 👤 Robert N Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:31
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/02; B21J9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US440474A
Cited
US606046A
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GB189511109A
Cited
US1291646A
Cited
US1383675A
Cited
US1961453A
Cited
US2016795A
Cited
US2452974A
Cited
US2458854A
Cited
US2620013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |