Patent US3144518A successfully refreshed from Google Patents.
US3144518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
"meet me" conference privacy system
Assignee: General Dynamics Corp
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Filing: 1962-01-26
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Granted: 1964-08-11
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Expires: 1982-01-26
Abstract
No abstract record available.
Inventors
- 👤 Bruce D Lummis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:06
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/56; H04M2203/00; H04M2203/50; H04M2203/5054
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN AN AUTOMATIC TELEPHONE SYSTEM, THE COMBINATION COMPRISING A PLURALITY OF N LINES, EACH HAVING AN ASSOCIATED SUBSCRIBER STATION; MEANS RESPONSIVE TO THE RECEIPT OF PREDETERMINED DIRECTIVE SIGNALS FROM SAID SUBSCRIBER STATIONS FOR AUTOMATICALLY ESTABLISHING A CONFERENCE CIRCUIT BETWEEN STATIONS WHICH HAVE TRANSMITTED SAID PREDETERMINED DIRECTIVE SIGNALS; MEANS CONNECTED TO SAID CONFERENCE CIRCUIT RESPONSIVE TO THE RECEIPT OF A FIRST ADDITIONAL DIRECTIVE SIGNAL FOR DENYING ACCESS TO SAID CONFERENCE CIRCUIT BY ANY OTHER LINE OF SAID SYSTEM; AND MEANS CONNECTED TO SAID CONFERENCE CIRCUIT AND RESPONSIVE TO THE RECEIPT OF A SECOND ADDITIONAL DIRECTIVE SIGNAL FOR GRANTING ACCESS TO SAID CONFERENCE CIRCUIT BY ANY OTHER LINE OF SAID SYSTEM.
Claim 2
Dependent Claim
109 words
IN AN AUTOMATIC TELEPHONE SYSTEM, THE COMBINATION COMPRISING A PLURALITY OF N LINES, EACH HAVING AN ASSOCIATED SUBSCRIBER STATION; MEANS RESPONSIVE TO THE RECEIPT OF PREDETERMINED DIRECTIVE SIGNALS FROM SAID SUBSCRIBER STATIONS FOR AUTOMATICALLY ESTABLISHING A CONFERENCE CIRCUIT BETWEEN STATIONS WHICH HAVE TRANSMITTED SAID PREDETERMINED DIRECTIVE SIGNALS; MEANS CONNECTED TO SAID CONFERENCE CIRCUIT RESPONSIVE TO THE RECEIPT OF A FIRST ADDITIONAL DIRECTIVE SIGNAL FOR DENYING ACCESS TO SAID CONFERENCE CIRCUIT BY ANY OTHER LINE OF SAID SYSTEM; AND MEANS CONNECTED TO SAID CONFERENCE CIRCUIT AND RESPONSIVE TO THE RECEIPT OF A SECOND ADDITIONAL DIRECTIVE SIGNAL FOR GRANTING ACCESS TO SAID CONFERENCE CIRCUIT BY ANY OTHER LINE OF SAID SYSTEM.
References Cited (Backward Citations)
US1679567A
Cited
US2386126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |