Patent US2900489A successfully refreshed from Google Patents.
US2900489A
Expired / Lapsed
US
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Contact jaw assembly for electric welding
Assignee: Individual
•
Filing: 1956-09-14
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Granted: 1959-08-18
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Expires: 1976-09-14
Abstract
No abstract record available.
Inventors
- 👤 Howard N Keener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:58
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/122; B23K9/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2184335A
Cited
US2289938A
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US2364826A
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US2379470A
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US2398355A
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GB641564A
Cited
US2756310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |