Patent US2815689A successfully refreshed from Google Patents.
US2815689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold welding tool
Assignee: ZF Active Safety US Inc
•
Filing: 1954-12-01
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Granted: 1957-12-10
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Expires: 1974-12-01
Abstract
No abstract record available.
Inventors
- 👤 William A Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:00
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE509058A
Cited
CA457465A
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US863909A
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US1233560A
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US1618764A
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US2161969A
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US2539419A
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FR995932A
Cited
US2522408A
Cited
US2701483A
Cited
US2708972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |