US2669606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic toll trunking system
Assignee: Stromberg Carlson Corp
•
Filing: 1950-10-16
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Granted: 1954-02-16
•
Expires: 1970-10-16
Abstract
No abstract record available.
Inventors
- 👤 Kessler Frank
- 👤 William W Pharis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:35
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/60; H04M17/00; H04M17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1487996A
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US1667917A
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US1929474A
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US1946228A
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US2113080A
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US2214245A
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US2374964A
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US2516788A
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US2471087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |