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US2841678A
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US
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High-frequency inductor arrangement for continuous seam welding
Assignee: Ohio Crankshaft Co
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Filing: 1955-03-21
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Granted: 1958-07-01
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Lloyd A Thorson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/40; B; B23; B23K; B23K13/00; B23K13/01; B23K13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1435306A
Cited
US1363159A
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US2209637A
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GB377655A
Cited
US2080400A
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US2485843A
Cited
GB616117A
Cited
GB716378A
Cited
US2666831A
Cited
US2697772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |