Patent US1488480A successfully refreshed from Google Patents.
US2003118A
Expired / Lapsed
US
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Electric welding apparatus
Assignee: Youngstown Sheet and Tube Co
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Filing: 1933-03-22
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Granted: 1935-05-28
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Expires: 1953-03-22
Abstract
No abstract record available.
Inventors
- 👤 George E Mirfield
- 👤 Robert E Lewis
- 👤 Firth Cyril
- 👤 John E Neale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:16
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/01; B23K13/02; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5116; Y10T29/5121; Y10T82/00; Y10T82/16; Y10T82/16426; Y10T82/16983
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) | 1938-05-27 | 1938-11-26 | 1939-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-27 | 1942-11-26 | 1943-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-27 | 1946-11-26 | 1947-05-28 | $7700.00 | Window Closed / Lapsed |