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Patent US2570692A successfully refreshed from Google Patents.
US2570692A
Expired / Lapsed
US
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Expanded metal electrical resistance
Assignee: EXMET ELECTRICAL Corp
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Filing: 1948-12-14
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Granted: 1951-10-09
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Expires: 1968-12-14
Abstract
No abstract record available.
Inventors
- 👤 Knight Walter Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:05
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/08; H01C1/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE345138C
Cited
US1318028A
Cited
US918535A
Cited
US1267978A
Cited
US1332030A
Cited
US1396871A
Cited
GB317517A
Cited
GB369231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |