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US2853580A
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Assignee: Hevi Duty Electric Co
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Filing: 1956-10-03
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Granted: 1958-09-23
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Expires: 1976-10-03
Abstract
No abstract record available.
Inventors
- 👤 Mauerer Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:16
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/74; H01H37/76; H01H37/761; H01H2037/762
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309233A
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US819608A
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US1684108A
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US1735133A
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US2056760A
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US2391680A
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US2493434A
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US2530228A
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US2738396A
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US2727110A
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US2740187A
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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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |