Patent US2836704A successfully refreshed from Google Patents.
US2836704A
Expired / Lapsed
US
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Arc welding machine
Assignee: INDEPENDENT IRON WORKS Inc
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Filing: 1956-10-08
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Granted: 1958-05-27
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Mason William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:31
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/18; B23K9/186; B23K9/188; B23K37/00; B23K37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1653376A
Cited
US1612317A
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US1978042A
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US2147461A
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US2357376A
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US2443771A
Cited
US2401722A
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US2460914A
Cited
US2536294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |