Patent US2802931A successfully refreshed from Google Patents.
US2802931A
Expired / Lapsed
US
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Overlapped joint welding device
Assignee: Dana Inc
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Filing: 1951-01-08
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Granted: 1957-08-13
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Expires: 1971-01-08
Abstract
No abstract record available.
Inventors
- 👤 Werner G Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:25
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2061671A
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US2189399A
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US2303720A
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US2500245A
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US2452189A
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US2401722A
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US2441748A
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US2472803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |