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Patent US3470533A successfully refreshed from Google Patents.
US3470533A
Expired / Lapsed
US
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Matrix switching of sources and control
Assignee: Nortel Networks Ltd
•
Filing: 1965-10-18
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Granted: 1969-09-30
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Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Tanner
- 👤 Ronan M Cambridge
- 👤 Morris M Beresford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:05
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/268; H04H; H04H60/00; H04H60/02; H04H60/04
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |