US3141068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Robert t
Assignee: —
•
Filing: —
•
Granted: 1964-07-14
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Expires: 1981-07-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:06
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/60; H04M1/62; H04M1/02; H04M1/6033; H04M19/00; H04M19/02; H04M19/04; H04M3/00; H04M3/60; H04M3/64
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
IN A TELEPHONE SYSTEM, A CENTRAL OFFICE BATTERY, SUBSTATION APPARATUS AT A REMOTE LOCATION WITH RESPECT TO SAID BATTERY, A SUBSCRIBER LINE PROVIDING FOR THE TRANSMISSION OF VOICE SIGNALS AND SUPERVISORY SIGNALS AND CONNECTED AT ONE END TO SAID BATTERY AND AT ITS OTHER END TO SAID SUBSTATION APPARATUS, SUBSCRIBER LINE EQUIPMENT INTERPOSED BETWEEN SAID CENTRAL BATTERY AND SAID ONE END OF SAID SUBSCRIBER LINE FOR EXTENDING DIRECT CURRENT FROM SAID BATTERY TO SAID SUBSTATION APPARATUS, SAID SUBSTATION APPARATUS COMPRISING A LIGHTING DEVICE OPERATED BY A VOLTAGE THAT IS RELATIVELY HIGH WITH RESPECT TO THE VOLTAGE OF SAID BATTERY, AND MEANS COMPRISING A TRANSISTOR OSCILLATOR OPERATED BY SAID CENTRAL BATTERY AND CONNECTED TO SAID LIGHTING DEVICE FOR SUPPLYING SAID RELATIVELY HIGH OPERATING VOLTAGE.
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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |