US2597689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc starting system
Assignee: General Electric Co
•
Filing: 1951-02-23
•
Granted: 1952-05-20
•
Expires: 1971-02-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Alanson U Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:58
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/067; H; H01; H01F; H01F29/00; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1343206A
Cited
US1374557A
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US1368507A
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US1351030A
Cited
US1480857A
Cited
GB182970A
Cited
US2030606A
Cited
US2283712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |