Patent US3198887A successfully refreshed from Google Patents.
US3198887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distributed telephone line concentrator
Assignee: AT&T Inc
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Filing: 1961-11-20
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Granted: 1965-08-03
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Chester E Brooks
- 👤 William C Sand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A TELEPHONE LINE CONCENTRATOR SYSTEM INCLUDING A CENTRAL OFFICE, A PLURALITY OF TRUNKS CONNECTED TO SAID OFFICE, A PLURALITY OF SUBSTATIONS REMOTE FROM SAID OFFICE, REMOTE SWITCHING MEANS FOR CONNECTING SAID SUBSTATIONS TO SAID TRUNKS UNDER CONTROL OF SAID CENTRAL OFFICE, AND MEANS IN SAID CENTRAL OFFICE RESPONSIVE TO THE ESTABLISHMENT OF A CONNECTION BETWEEN SAID SUBSTATIONS OVER TWO OF SAID TRUNKS FOR CONNECTING SAID SUBSTATIONS TO A SINGLE ONE OF SAID TRUNKS.,
Claim 2
Dependent Claim
73 words
A TELEPHONE LINE CONCENTRATOR SYSTEM INCLUDING A CENTRAL OFFICE, A PLURALITY OF TRUNKS CONNECTED TO SAID OFFICE, A PLURALITY OF SUBSTATIONS REMOTE FROM SAID OFFICE, REMOTE SWITCHING MEANS FOR CONNECTING SAID SUBSTATIONS TO SAID TRUNKS UNDER CONTROL OF SAID CENTRAL OFFICE, AND MEANS IN SAID CENTRAL OFFICE RESPONSIVE TO THE ESTABLISHMENT OF A CONNECTION BETWEEN SAID SUBSTATIONS OVER TWO OF SAID TRUNKS FOR CONNECTING SAID SUBSTATIONS TO A SINGLE ONE OF SAID TRUNKS.,
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |