US2849568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switching devices
Assignee: British Telecommunications PLC
•
Filing: 1954-04-26
•
Granted: 1958-08-26
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Harold D Gaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:23
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US746998A
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US1097455A
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US1410855A
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US1714680A
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FR701572A
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US2209084A
Cited
US2267102A
Cited
US2428569A
Cited
US2431381A
Cited
US2406028A
Cited
US2695379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |