US2541076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multichannel pulse communicating system
Assignee: STC PLC
•
Filing: 1944-08-07
•
Granted: 1951-02-13
•
Expires: 1964-08-07
Abstract
No abstract record available.
Inventors
- 👤 Labin Emile
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:19
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048081A
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US2172354A
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US2266401A
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US2262838A
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US2199634A
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US2273163A
Cited
US2403210A
Cited
US2391776A
Cited
US2395467A
Cited
US2418116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |