US2481626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance welding of hard to weld metals, particularly for finned tubing
Assignee: EXTENDED SURFACE DIVISION OF D
•
Filing: 1946-04-10
•
Granted: 1949-09-13
•
Expires: 1966-04-10
Abstract
No abstract record available.
Inventors
- 👤 Emil A Schryber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:41
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/16; B23K11/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49393
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2232176A
Cited
US2151758A
Cited
US2261137A
Cited
US2330943A
Cited
US2344790A
Cited
US2367715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |