Patent US2649527A successfully refreshed from Google Patents.
US2649527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butt welding tube ends by induction heating
Assignee: Combustion Engineering Inc
•
Filing: 1951-01-18
•
Granted: 1953-08-18
•
Expires: 1971-01-18
Abstract
No abstract record available.
Inventors
- 👤 Chapman Edward Corbin
- 👤 Jr Roy E Lorentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:57
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1893926A
Cited
US2024906A
Cited
US2179176A
Cited
US2422305A
Cited
US2493950A
Cited
US2480299A
Cited
US2496188A
Cited
US2542393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |