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US2553362A
Expired / Lapsed
US
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Electrical insulation
Assignee: Sprague Electric Co
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Filing: 1946-05-28
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Granted: 1951-05-15
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Expires: 1966-05-28
Abstract
No abstract record available.
Inventors
- 👤 Eli M Dannenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:09
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1906044A
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US2001071A
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US2352974A
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US2350822A
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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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |