Patent US1233802A successfully refreshed from Google Patents.
Patent US2651701A successfully refreshed from Google Patents.
US2651701A
Expired / Lapsed
US
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Portable spot welder
Assignee: Individual
•
Filing: 1951-04-17
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Granted: 1953-09-08
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Expires: 1971-04-17
Abstract
No abstract record available.
Inventors
- 👤 Backen Arthur Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:28
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/28; B23K11/30; B23K11/31; B23K11/314
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US222787A
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US1489458A
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US2418781A
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US2440463A
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US2470074A
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US2464054A
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US2454338A
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US2465879A
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US2517653A
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US2535946A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |