Patent US2512834A successfully refreshed from Google Patents.
US2512834A
Expired / Lapsed
US
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Intercommunicating system
Assignee: Individual
•
Filing: 1946-12-19
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Granted: 1950-06-27
•
Expires: 1966-12-19
Abstract
No abstract record available.
Inventors
- 👤 Legerth Karl Ingemar Bertil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:08
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1356256A
Cited
US1647606A
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US2036023A
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US2054933A
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US2110358A
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US2200814A
Cited
US2269142A
Cited
US2269143A
Cited
US2347080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |