US3105125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power separation filter
Assignee: AT&T Inc
•
Filing: 1959-10-30
•
Granted: 1963-09-24
•
Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Julins J Kassig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:23
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN A REPEATERED SIGNAL TRANSMISSION SYSTEM, A TRANSMISSION LINE, FIRST AND SECOND TRANSMISSION CHANNELS, FILTER MEANS CONNECTED BETWEEN SAID LINE AND SAID CHANNELS FOR APPLYING HIGH FREQUENCY SIGNALS ON SAID LINE TO SAID FIRST CHANNEL AND DIRECT-CURRENT SIGNALS ON SAID LINE TO SAID SECOND CHANNEL, AN AMPLIFIER, MEANS COUPLING SAID AMPLIFIER IN SAID FIRST CHANNEL FOR AMPLIFYING SAID HIGH FREQUENCY SIGNALS, A CONNECTION BETWEEN SAID AMPLIFIER AND SAID SECOND CHANNEL FOR SUPPLYING OPERATING POTENTIAL TO SAID AMPLIFIER FROM SAID SECOND CHANNEL, A FIRST INDUCTOR CONNECTED IN SAID FIRST CHANNEL AND HAVING A HIGH IMPEDANCE TO SAID HIGH FREQUENCY SIGNALS, A FURTHER CONNECTION FROM A TERMINAL OF SAID FIRST INDUCTOR WHICH IS REMOTE FROM SAID FILTER MEANS TO SAID SECOND CHANNEL, SAID FURTHER CONNECTION HAVING SUBSTANTIALLY ZERO IMPEDANCE TO BOTH SAID HIGH AND SAID LOW FREQUENCIES, AND A SECOND INDUCTOR CONNECTED IN SAID FIRST CHANNEL FOR CANCELLING THE INDUCTIVE EFFECT OF SAID FIRST INDUCTOR THEREIN.
Claim 2
Dependent Claim
154 words
IN A REPEATERED SIGNAL TRANSMISSION SYSTEM, A TRANSMISSION LINE, FIRST AND SECOND TRANSMISSION CHANNELS, FILTER MEANS CONNECTED BETWEEN SAID LINE AND SAID CHANNELS FOR APPLYING HIGH FREQUENCY SIGNALS ON SAID LINE TO SAID FIRST CHANNEL AND DIRECT-CURRENT SIGNALS ON SAID LINE TO SAID SECOND CHANNEL, AN AMPLIFIER, MEANS COUPLING SAID AMPLIFIER IN SAID FIRST CHANNEL FOR AMPLIFYING SAID HIGH FREQUENCY SIGNALS, A CONNECTION BETWEEN SAID AMPLIFIER AND SAID SECOND CHANNEL FOR SUPPLYING OPERATING POTENTIAL TO SAID AMPLIFIER FROM SAID SECOND CHANNEL, A FIRST INDUCTOR CONNECTED IN SAID FIRST CHANNEL AND HAVING A HIGH IMPEDANCE TO SAID HIGH FREQUENCY SIGNALS, A FURTHER CONNECTION FROM A TERMINAL OF SAID FIRST INDUCTOR WHICH IS REMOTE FROM SAID FILTER MEANS TO SAID SECOND CHANNEL, SAID FURTHER CONNECTION HAVING SUBSTANTIALLY ZERO IMPEDANCE TO BOTH SAID HIGH AND SAID LOW FREQUENCIES, AND A SECOND INDUCTOR CONNECTED IN SAID FIRST CHANNEL FOR CANCELLING THE INDUCTIVE EFFECT OF SAID FIRST INDUCTOR THEREIN.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |