Patent EP0478438A1 successfully refreshed from Google Patents.
Patent US2678370A successfully refreshed from Google Patents.
US2678370A
Expired / Lapsed
US
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Method and means for butt welding large metallic surfaces
Assignee: Ohio Crankshaft Co
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Filing: 1950-02-28
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Granted: 1954-05-11
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Expires: 1970-02-28
Abstract
No abstract record available.
Inventors
- 👤 Francis S Denneen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:32
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/04; B23K11/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US843515A
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US1022712A
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US1270860A
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US1959791A
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US2014082A
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US2205425A
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US2222906A
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US2187529A
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US2241216A
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US2416488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |