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US2623950A
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US
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Deposit-controlled timing system for telephony
Assignee: TELEFON FABRIK AUTOMATIC AS
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Filing: 1948-09-08
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Granted: 1952-12-30
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Expires: 1968-09-08
Abstract
No abstract record available.
Inventors
- 👤 Ungar Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:01
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/10; H04M17/00; H04M17/02; H04M17/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1830873A
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US1895020A
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US2000804A
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US2122550A
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US2020466A
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US2082561A
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US2224702A
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US2230486A
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US2306654A
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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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |