Patent US2181502A successfully refreshed from Google Patents.
US2181502A
Expired / Lapsed
US
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Apparatus for welding metal strip end to end
Assignee: United Engineering and Foundry Co
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Filing: 1937-06-24
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Granted: 1939-11-28
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Expires: 1957-06-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Florence C Biggert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:28
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/08; B23K11/087; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5183; Y10T409/00; Y10T409/50; Y10T409/501476; Y10T409/50164; Y10T409/501968; Y10T83/00; Y10T83/869; Y10T83/8821; Y10T83/8822
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-11-27 | 1943-05-29 | 1943-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-27 | 1947-05-29 | 1947-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-27 | 1951-05-29 | 1951-11-28 | $7700.00 | Window Closed / Lapsed |