US2952734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-telegraph system
Assignee: Government of Netherlands
•
Filing: 1954-04-19
•
Granted: 1960-09-13
•
Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 Hendrik Cornelis Anthon Duuren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/22; H04L5/24; H04L5/245; H03; H03M; H03M13/00; H03M13/47; H03M13/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1873785A
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US2082740A
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US2300463A
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GB642244A
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US2574362A
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US2563589A
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US2625601A
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US2682574A
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US2687451A
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US2744955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |