US2641673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Advance Transformer Co
•
Filing: 1951-03-13
•
Granted: 1953-06-09
•
Expires: 1971-03-13
Abstract
No abstract record available.
Inventors
- 👤 Robert E Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:31
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/0026; B23K9/0035
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE16804E
Cited
US2023086A
Cited
US2121665A
Cited
US2143969A
Cited
US2203151A
Cited
US2280551A
Cited
US2441507A
Cited
US2459625A
Cited
US2550641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |