US3303289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone station apparatus
Assignee: AT&T Inc
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Filing: 1966-07-25
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Granted: 1967-02-07
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Expires: 1986-07-25
Abstract
No abstract record available.
Inventors
- 👤 Melville S Hawley
- 👤 Donald W Mclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:19
CPC Classifications
H; H04; H04Q; H04Q5/00; H04Q5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
TELEPHONE STATION APPARATUS COMPRISING A COIL; A CAPACITOR; A SWITCHING NETWORK COMPRISING A FIRST AND A SECOND SWITCHING ELEMENT, EACH OF WHICH COMPRISES TWO LAYERS OF P-TYPE SEMICONDUCTOR MATERIAL ARRANGED ALTERNATELY WITH TWO LAYERS OF N-TYPE SEMICONDUCTOR MATERIAL, EACH SWITCHING ELEMENT HAVING A FIRST TERMINAL ELECTRODE MAKING ELECTRICAL CONTACT WITH THE OUTER P LAYER THEREOF AND A SECOND TERMINAL ELECTRODE MAKING ELECTRICAL CONTACT WITH THE OUTER N LAYER THEREOF, AND ONE OF THE SWITCHING ELEMENTS HAVING A BASE ELECTRODE MAING ELECTRICAL CONTACT WITH AN INTERMEDIATE LAYER THEREOF, CIRCUIT MEANS FOR CONNECTING THE FIRST TERMINAL ELECTRODE OF THE FIRST SWITCHING ELEMENT WITH THE SECOND TERMINAL ELECTRODE OF THE SECOND SWITCHING ELEMENT AND THE SECOND TERMINAL ELECTRODE OF THE FIRST SWITCHING ELEMENT WITH THE FIRST TERMINAL ELECTRODE OF THE SECOND SWITCHING ELEMENT; A SERIES PATH COMPRISING THE COIL, THE CAPACITOR, AND THE CIRCUIT MEANS AND SWITCHING ELEMENTS OF THE SWITCHING NETWORK, ONE END OF THE SERIES PATH BEING CONNECTED TO ONE CONDUCTOR OF A TELEPHONE LINE, THE OTHER END OF THE SERIES PATH BEING CONNECTED TO GROUND, AND THE BASE ELECTRODE BEING CONNECTED TO THE SECOND CONDUCTOR OF THE TELEPHONE LINE.
Claim 2
Dependent Claim
189 words
TELEPHONE STATION APPARATUS COMPRISING A COIL; A CAPACITOR; A SWITCHING NETWORK COMPRISING A FIRST AND A SECOND SWITCHING ELEMENT, EACH OF WHICH COMPRISES TWO LAYERS OF P-TYPE SEMICONDUCTOR MATERIAL ARRANGED ALTERNATELY WITH TWO LAYERS OF N-TYPE SEMICONDUCTOR MATERIAL, EACH SWITCHING ELEMENT HAVING A FIRST TERMINAL ELECTRODE MAKING ELECTRICAL CONTACT WITH THE OUTER P LAYER THEREOF AND A SECOND TERMINAL ELECTRODE MAKING ELECTRICAL CONTACT WITH THE OUTER N LAYER THEREOF, AND ONE OF THE SWITCHING ELEMENTS HAVING A BASE ELECTRODE MAING ELECTRICAL CONTACT WITH AN INTERMEDIATE LAYER THEREOF, CIRCUIT MEANS FOR CONNECTING THE FIRST TERMINAL ELECTRODE OF THE FIRST SWITCHING ELEMENT WITH THE SECOND TERMINAL ELECTRODE OF THE SECOND SWITCHING ELEMENT AND THE SECOND TERMINAL ELECTRODE OF THE FIRST SWITCHING ELEMENT WITH THE FIRST TERMINAL ELECTRODE OF THE SECOND SWITCHING ELEMENT; A SERIES PATH COMPRISING THE COIL, THE CAPACITOR, AND THE CIRCUIT MEANS AND SWITCHING ELEMENTS OF THE SWITCHING NETWORK, ONE END OF THE SERIES PATH BEING CONNECTED TO ONE CONDUCTOR OF A TELEPHONE LINE, THE OTHER END OF THE SERIES PATH BEING CONNECTED TO GROUND, AND THE BASE ELECTRODE BEING CONNECTED TO THE SECOND CONDUCTOR OF THE TELEPHONE LINE.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |