US2913527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telecommunication exchange systems
Assignee: International Standard Electric Corp
•
Filing: 1954-04-14
•
Granted: 1959-11-17
•
Expires: 1974-04-14
Abstract
No abstract record available.
Inventors
- 👤 Wright Esmond Philip Goodwin
- 👤 Rice Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:46
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/08; H04M15/04; H04M15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2675427A
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US2680239A
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US2723311A
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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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |