US2763725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone systems
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1950-05-13
•
Granted: 1956-09-18
•
Expires: 1970-05-13
Abstract
No abstract record available.
Inventors
- 👤 John E Ostline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:09
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/10; H04M15/04; H04Q; H04Q3/00; H04Q3/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2183656A
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US2447533A
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GB565665A
Cited
US2535509A
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US2362425A
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US2522000A
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US2580757A
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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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |