Patent US2694752A successfully refreshed from Google Patents.
US2694752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telecommunication exchange
Assignee: International Standard Electric Corp
•
Filing: 1950-09-22
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Granted: 1954-11-16
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Expires: 1970-09-22
Abstract
No abstract record available.
Inventors
- 👤 Wright Esmond Philip Goodwin
- 👤 Ridler Desmond Sydney
- 👤 Weir Donald Adams
- 👤 Rice Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:28
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2291036A
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US2291040A
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US2310452A
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US2315705A
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US2299898A
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US2303356A
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US2326478A
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US2347107A
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US2348626A
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US2566063A
Cited
US2582959A
Cited
US2619548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |