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US2628301A
Expired / Lapsed
US
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Welding head
Assignee: Advance Transformer Co
•
Filing: 1951-03-08
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Granted: 1953-02-10
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Expires: 1971-03-08
Abstract
No abstract record available.
Inventors
- 👤 Robert E Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:03
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/0026; B23K9/0035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2067363A
Cited
US2229570A
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US2358158A
Cited
GB566908A
Cited
US2441507A
Cited
US2404383A
Cited
CH266691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |