Patent US3087022A successfully refreshed from Google Patents.
US3087022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic communication system
Assignee: General Dynamics Corp
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Filing: 1959-05-21
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Granted: 1963-04-23
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Expires: 1979-05-21
Abstract
No abstract record available.
Inventors
- 👤 Brightman Barrie
- 👤 James G Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:23
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A TELEPHONE SYSTEM, A PLURALITY OF LINES, A SEIZE DETECTOR, A REGISTER, A MULTICHANNEL TRANSMISSION NETWORK INTERCONNECTING SAID LINES WITH SAID SEIZE DETECTOR AND SAID REGISTER, MEANS FOR INDIVIDUALLY ASSIGNING THE CHANNELS OF SAID NETWORK TO SAID LINES, MEANS FOR TRANSMITTING AN ALTERNATING CURRENT SEIZE SIGNAL OVER A LINE WHEN A CALL IS INITIATED ON THAT LINE, MEANS FOR CONTROLLING SAID SEIZE DETECTOR TO SCAN THE CHANNELS OF SAID NETWORK FOR SEIZE SIGNALS, AND MEANS RESPONSIVE TO THE DETECTION OF A SEIZE SIG-
Claim 2
Dependent Claim
84 words
IN A TELEPHONE SYSTEM, A PLURALITY OF LINES, A SEIZE DETECTOR, A REGISTER, A MULTICHANNEL TRANSMISSION NETWORK INTERCONNECTING SAID LINES WITH SAID SEIZE DETECTOR AND SAID REGISTER, MEANS FOR INDIVIDUALLY ASSIGNING THE CHANNELS OF SAID NETWORK TO SAID LINES, MEANS FOR TRANSMITTING AN ALTERNATING CURRENT SEIZE SIGNAL OVER A LINE WHEN A CALL IS INITIATED ON THAT LINE, MEANS FOR CONTROLLING SAID SEIZE DETECTOR TO SCAN THE CHANNELS OF SAID NETWORK FOR SEIZE SIGNALS, AND MEANS RESPONSIVE TO THE DETECTION OF A SEIZE SIG-
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |