US2937238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex telecommunication system
Assignee: Umicore NV SA
•
Filing: 1954-05-19
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Granted: 1960-05-17
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Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 Mercier Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:42
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/042; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1645607A
Cited
US2414265A
Cited
US2541076A
Cited
US2454815A
Cited
US2459131A
Cited
US2680153A
Cited
US2779933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |