US2541355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay with passive springs
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1947-02-12
•
Granted: 1951-02-13
•
Expires: 1967-02-12
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Graybill
- 👤 Sengebusch Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:47
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/56; H01H50/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB328690A
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US2077091A
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US2115836A
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US2120980A
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US2096054A
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US2135832A
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US2198704A
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US2282687A
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US2337694A
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US2248584A
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US2348088A
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US2472709A
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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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |