US3496468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delta-modulation communication system with hyperbolic companding characteristics
Assignee: NEC Corp
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Filing: 1966-12-13
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Granted: 1970-02-17
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Expires: 1986-12-13
Abstract
No abstract record available.
Inventors
- 👤 Hisashi Kaneko
- 👤 Atsushi Tomozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:17
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/13; A61K31/135; H; H03; H03M; H03M3/00; H03M3/02; H03M3/022; H04; H04B; H04B14/00; H04B14/02; H04B14/06; H04B14/062; H04B14/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3249870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |