US3551813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division satellite communication system
Assignee: NEC Corp
•
Filing: 1967-11-16
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Granted: 1970-12-29
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Expires: 1987-11-16
Abstract
No abstract record available.
Inventors
- 👤 Hisashi Kaneko
- 👤 Yukio Takimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:36
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/204; H04B7/212; H04B7/2125; H04B7/2126; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |