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US2918635A
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Assignee: Sprague Electric Co
•
Filing: 1955-01-17
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Granted: 1959-12-22
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Schenker Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:23
CPC Classifications
H; H03; H03H; H03H1/00; H03H1/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1298396A
Cited
US1730903A
Cited
US1873298A
Cited
CH179875A
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DE873576C
Cited
DE880329C
Cited
US2721311A
Cited
US2644122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |