Patent US3255306A successfully refreshed from Google Patents.
US3255306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed-circuit television network
Assignee: Individual
•
Filing: 1958-06-04
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Granted: 1966-06-07
•
Expires: 1978-06-04
Abstract
No abstract record available.
Inventors
- 👤 John O Campbell
- 👤 Yee J Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:27
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/173; H04N7/17309
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
IN A CLOSED-CIRCUIT PROGRAMMED TELEVISION SERVICE DISTRIBUTION SYSTEM, THE COMBINATION OF: A TRANSMISSION LINE; MEANS FOR DELIVERING TO SAID TRANSMISSION LINE A PLURALITY OF TELEVISION PROGRAM SIGNALS; AT LEAST ONE TELEVISION RECEIVER; A PROGRAM SELECTOR COUPLED BETWEEN SAID TELEVISION RECEIVER AND SAID TRANSMISSION LINE, THE SELECTOR COMPRISING FIRST MEANS FOR SELECTIVELY COUPLING ANY ONE OF THE TELEVISION PROGRAMS TO SAID RECEIVER, SAID SELECTOR FURTHER COMPRISING SECOND MEANS FOR GENERATING AND APPLYING TO THE TRANSMISSION LINE SIGNAL INTELLIGENCE WHICH IDENTIFIES THE SELECTOR AND THE PROGRAM; AND MEANS COUPLED TO THE TRANSMISSION LINE FOR RECEIVING SAID SIGNAL INTELLIGENCE AND RECORDING ITS TIME DURATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |