US3200205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech immunity voice frequency signalling system
Assignee: International Standard Electric Corp
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Filing: 1962-05-29
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Granted: 1965-08-10
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Expires: 1982-05-29
Abstract
No abstract record available.
Inventors
- 👤 Herter Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:11
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/50; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/444; H04Q1/45; H04Q1/453; H04Q1/4535
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A VOICE FREQUENCY SIGNALLING SYSTEM FOR SELECTIVELY TRANSMITTING VOICE FREQUENCY SIGNALS FROM A REMOTE STATION TO CENTRAL EQUIPMENT OVER AN INTERCONNECTING SIGNALLING LINE, MEANS IN THE SAID STATION RESPONSIVE TO THE INITIATION OF A CALL FOR ESTABLISHING A DIRECT CURRENT PATH OVER SAID LINE AND FOR TRANSMITTING VOICE FREQUENCY SIGNALS INDICATIVE OF ANY DIGIT OF A TELEPHONE NUMBER OVER SAID LINE, MEANS IN THE CENTRAL EQUIPMENT FOR STORING SAID SIGNALS, MEANS IN THE SAID STATION RESPONSIVE TO ENDING EACH SAID TRANSMISSION OF SIGNALS FOR TEMPORARILY INTERRUPTING SAID DIRECT CURRENT PATH, SIGNAL EVALUATING MEANS IN SAID CENTRAL EQUIPMENT, AND MEANS IN SAID CENTRAL EQUIPMENT RESPONSIVE TO SAID INTERRUPTION FOR OPERATING SAID EVALUATING MEANS.
Claim 2
Dependent Claim
113 words
IN A VOICE FREQUENCY SIGNALLING SYSTEM FOR SELECTIVELY TRANSMITTING VOICE FREQUENCY SIGNALS FROM A REMOTE STATION TO CENTRAL EQUIPMENT OVER AN INTERCONNECTING SIGNALLING LINE, MEANS IN THE SAID STATION RESPONSIVE TO THE INITIATION OF A CALL FOR ESTABLISHING A DIRECT CURRENT PATH OVER SAID LINE AND FOR TRANSMITTING VOICE FREQUENCY SIGNALS INDICATIVE OF ANY DIGIT OF A TELEPHONE NUMBER OVER SAID LINE, MEANS IN THE CENTRAL EQUIPMENT FOR STORING SAID SIGNALS, MEANS IN THE SAID STATION RESPONSIVE TO ENDING EACH SAID TRANSMISSION OF SIGNALS FOR TEMPORARILY INTERRUPTING SAID DIRECT CURRENT PATH, SIGNAL EVALUATING MEANS IN SAID CENTRAL EQUIPMENT, AND MEANS IN SAID CENTRAL EQUIPMENT RESPONSIVE TO SAID INTERRUPTION FOR OPERATING SAID EVALUATING MEANS.
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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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |