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Patent US3500206A successfully refreshed from Google Patents.
US3500206A
Expired / Lapsed
US
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Angle modulation signal companding system
Assignee: NEC Corp
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Filing: 1967-03-01
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Granted: 1970-03-10
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Expires: 1987-03-01
Abstract
No abstract record available.
Inventors
- 👤 Hisashi Kaneko
- 👤 Atsushi Tomozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:25
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/62; H04B1/64; H03; H03C; H03C3/00; H03C3/02; H03C3/06; H04B14/00; H04B14/002; H04B14/006
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |