Patent US2489475A successfully refreshed from Google Patents.
US2489475A
Expired / Lapsed
US
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Magnetic welder's ground clamp
Assignee: DINGS MAGNETIC SEPARATOR Co
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Filing: 1947-12-18
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Granted: 1949-11-29
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Expires: 1967-12-18
Abstract
No abstract record available.
Inventors
- 👤 Karl A Blind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:32
CPC Classifications
H; H01; H01R; H01R11/00; H01R11/11; H01R11/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1105552A
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US1561554A
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US1778481A
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US2083845A
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US2170287A
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US2312083A
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US2287112A
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US2437633A
Cited
US2429526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |