US2935571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intertoll dial switching and signaling system
Assignee: General Dynamics Corp
•
Filing: 1955-09-22
•
Granted: 1960-05-03
•
Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 William W Pharis
- 👤 Ferdinand J Campa
- 👤 Herbert M Blinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:47
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2792451A
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US2744963A
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US2796466A
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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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |