Patent US3394229A successfully refreshed from Google Patents.
US3394229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toll ticketing telephone system
Assignee: TDK Micronas GmbH
•
Filing: 1963-12-16
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Granted: 1968-07-23
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Miller Thomas Paul
- 👤 Duncan Robert Hudson
- 👤 Sopinski James Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3028454A
Cited
US3175039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |