US3028453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone substation including presetting means for multiple symbol combinations
Assignee: Autophon AG
•
Filing: 1957-10-07
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Granted: 1962-04-03
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Expires: 1977-10-07
Abstract
No abstract record available.
Inventors
- 👤 Kappeler Hans
- 👤 Streit Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/272; H04M1/274; H04M1/276
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2244500A
Cited
US2393790A
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US2697749A
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US2791638A
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US2855585A
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US2892897A
Cited
US2763726A
Cited
US2824173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |