Patent US2620394A successfully refreshed from Google Patents.
US2620394A
Expired / Lapsed
US
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High-speed telegraphic system
Assignee: Individual
•
Filing: 1950-03-03
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Granted: 1952-12-02
•
Expires: 1970-03-03
Abstract
No abstract record available.
Inventors
- 👤 Georges Valensi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:48
CPC Classifications
H; H03; H03M; H03M5/00; H04; H04L; H04L13/00; H04L13/18; H04L13/182; H04L13/184; H04L17/00; H04L17/16; H04L17/30; H04L21/00; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4902; H04L25/4917
Claims Analysis
Total Claims: 0
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |