Patent US3215781A successfully refreshed from Google Patents.
US3215781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intercommunication system
Assignee: Webster Electric Co Inc
•
Filing: 1962-07-30
•
Granted: 1965-11-02
•
Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Calvin W Yong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:47
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN INTERCOMMUNICATION SYSTEM COMPRISING A PLURALITY OF STATIONS, A COMMON CONTROL UNTIL REMOTE FROM SAID STATIONS, A SIGNALING LINK INCLUDING ONE VOICE CHANNEL COMMON TO ALL OF SID STATIONS AND A PLURALITY OF OTHER VOICE CHANNELS EACH INDIVIDUAL TO TONE OF SAID STATIONS, SAID SIGNALING LINK CONNECTING SAID STATIONS TO SAID COMMON CONTROL UNIT, AMPLIFYING MEANS IN SAID CONTROL UNIT COMMON OT ALL OF SAID STATIONS, STATION SELECTOR MEANS IN SAID CONTROL UNIT OPERABLE FROM A CALLING ONE OF SAID STATIONS FOR ESTABLISHING A COMMUNICATION PATH FROM SAID CALLING STATION TO A CALLED ONE OF SAID STATIONS, SAID COMMUNICATION PATH INCLUDING SAID COMMON VOICE CHANNEL CONNECTED BETWEEN ONE OF SAID CALLING AND CALLED STATIONS AND SAID COMMON AMPLIFYING MEANS AND ONE OF SAID INDIVIDUAL VOICE CHANNELS CONNECTED BETWEEN SAID COMMON AMPLIFYING MEANS AND THE OTHER OF SAID CALLING AND CALLED STATIONS.
Claim 2
Dependent Claim
141 words
AN INTERCOMMUNICATION SYSTEM COMPRISING A PLURALITY OF STATIONS, A COMMON CONTROL UNTIL REMOTE FROM SAID STATIONS, A SIGNALING LINK INCLUDING ONE VOICE CHANNEL COMMON TO ALL OF SID STATIONS AND A PLURALITY OF OTHER VOICE CHANNELS EACH INDIVIDUAL TO TONE OF SAID STATIONS, SAID SIGNALING LINK CONNECTING SAID STATIONS TO SAID COMMON CONTROL UNIT, AMPLIFYING MEANS IN SAID CONTROL UNIT COMMON OT ALL OF SAID STATIONS, STATION SELECTOR MEANS IN SAID CONTROL UNIT OPERABLE FROM A CALLING ONE OF SAID STATIONS FOR ESTABLISHING A COMMUNICATION PATH FROM SAID CALLING STATION TO A CALLED ONE OF SAID STATIONS, SAID COMMUNICATION PATH INCLUDING SAID COMMON VOICE CHANNEL CONNECTED BETWEEN ONE OF SAID CALLING AND CALLED STATIONS AND SAID COMMON AMPLIFYING MEANS AND ONE OF SAID INDIVIDUAL VOICE CHANNELS CONNECTED BETWEEN SAID COMMON AMPLIFYING MEANS AND THE OTHER OF SAID CALLING AND CALLED STATIONS.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |