US3398239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilevel coded communication system employing frequency-expanding code conversion
Assignee: TDK Micronas GmbH
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Filing: 1964-05-21
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Granted: 1968-08-20
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Expires: 1984-05-21
Abstract
No abstract record available.
Inventors
- 👤 Rabow Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:44
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/26; H04B; H04B14/00; H04B14/002; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917; H04L27/02; H04L27/06; H04L5/00; H04L5/02; H04L5/04; H04L5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |