US2546974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse multiplex signaling system
Assignee: International Standard Electric Corp
•
Filing: 1946-06-28
•
Granted: 1951-04-03
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Expires: 1966-06-28
Abstract
No abstract record available.
Inventors
- 👤 Chatterjea Prafulla Kumar
- 👤 Ambrose Dermot Min
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:06
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/042; H03; H03K; H03K7/00; H04B; H04B14/00; H04B14/02; H04J3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2007809A
Cited
US2256336A
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US2263369A
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US2403210A
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US2395467A
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US2429613A
Cited
US2418116A
Cited
US2408077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |