Patent US2954436A successfully refreshed from Google Patents.
US2954436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receivers for frequency shift-keyed telegraph and similar signals
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
•
Filing: 1958-05-02
•
Granted: 1960-09-27
•
Expires: 1978-05-02
Abstract
No abstract record available.
Inventors
- 👤 Manier Maurice Auguste Joseph
- 👤 Malassenet Armand Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34; H03G3/341; H03G11/00; H03G11/06; H04; H04L; H04L27/00; H04L27/10; H04L27/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |