US2498899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical signaling system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1945-08-27
•
Granted: 1950-02-28
•
Expires: 1965-08-27
Abstract
No abstract record available.
Inventors
- 👤 Saville Willie
- 👤 Roseby Philip Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:03
CPC Classifications
H; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1313; Y; Y02; Y02E; Y02E60/00; Y04; Y04S; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1674757A
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US706575A
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US1710755A
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US1746756A
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US1822439A
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US1943524A
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US1981040A
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US2046696A
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US2141489A
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US2109215A
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US2136248A
Cited
US2395132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |