Patent US3119982A successfully refreshed from Google Patents.
US3119982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver circuits for selective calling
Assignee: US Philips Corp
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Filing: 1959-07-28
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Granted: 1964-01-28
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Expires: 1979-07-28
Abstract
No abstract record available.
Inventors
- 👤 Willems Ebertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A RECEIVER FOR PROVIDING SELECTIVE OPERATION IN RESPONSE TO A CALLING SIGNAL INCLUDING A PLURALITY OF DIFFERENT PREDETERMINED FREQUENCIES ARRANGED IN CHRONOLOGICAL SEQUENCE, COMPRISING A PLURALITY OF SELECTIVE NETWORKS, EACH NETWORK BEING TUNED TO A DIFFERENT ONE OF SAID PREDETERMINED FREQUENCIES, A PLURALITY OF TRANSISTORS CORRESPONDING RESPECTIVELY TO SAID SELECTIVE NETWORKS, EACH TRANSISTOR HAVING AN EMITTER, A COLLECTOR AND A BASE ELECTRODE, A COUPLING NETWORK FOR COUPLING EACH OF SAID SELECTIVE NETWORKS TO THE BASE ELECTRODE OF ITS CORRESPONDING TRANSISTOR CORRESPONDING TO THE LAST FREQUENCY OF THE SEQUENCE, MEANS FOR NORMALLY BIASING EACH OF THE REMAINING TRANSISTORS TO CONDUCTION, THE EMITTER-COLLECTOR CIRCUIT OF EACH CONDUCTING TRANSISTOR BEING CONNECTED TO THE COUPLING NETWORK OF THE NEXT-SUCCEEDING NETWORK AND THEREBY NORMALLY SHUNTING THE OSCILLATIONS FROM THE NEXT SUCCEEDING SELECTIVE NETWORK TO THE BASE OF ITS ASSOCIATED TRANSISTOR, EACH TRANSISTOR RECTIFYING THE SIGNAL AP-
Claim 2
Dependent Claim
141 words
A RECEIVER FOR PROVIDING SELECTIVE OPERATION IN RESPONSE TO A CALLING SIGNAL INCLUDING A PLURALITY OF DIFFERENT PREDETERMINED FREQUENCIES ARRANGED IN CHRONOLOGICAL SEQUENCE, COMPRISING A PLURALITY OF SELECTIVE NETWORKS, EACH NETWORK BEING TUNED TO A DIFFERENT ONE OF SAID PREDETERMINED FREQUENCIES, A PLURALITY OF TRANSISTORS CORRESPONDING RESPECTIVELY TO SAID SELECTIVE NETWORKS, EACH TRANSISTOR HAVING AN EMITTER, A COLLECTOR AND A BASE ELECTRODE, A COUPLING NETWORK FOR COUPLING EACH OF SAID SELECTIVE NETWORKS TO THE BASE ELECTRODE OF ITS CORRESPONDING TRANSISTOR CORRESPONDING TO THE LAST FREQUENCY OF THE SEQUENCE, MEANS FOR NORMALLY BIASING EACH OF THE REMAINING TRANSISTORS TO CONDUCTION, THE EMITTER-COLLECTOR CIRCUIT OF EACH CONDUCTING TRANSISTOR BEING CONNECTED TO THE COUPLING NETWORK OF THE NEXT-SUCCEEDING NETWORK AND THEREBY NORMALLY SHUNTING THE OSCILLATIONS FROM THE NEXT SUCCEEDING SELECTIVE NETWORK TO THE BASE OF ITS ASSOCIATED TRANSISTOR, EACH TRANSISTOR RECTIFYING THE SIGNAL AP-
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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |