Patent US3133157A successfully refreshed from Google Patents.
US3133157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Class of service telephone system
Assignee: International Telephone and Telegraph Corp
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Filing: 1962-06-25
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Granted: 1964-05-12
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Eric G Platt
- 👤 William K C Yuan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:01
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/70; H03K17/72; H03K19/00; H03K19/02; H03K19/173; H03K19/177; H03K23/00; H03K23/002; H10; H10D; H10D84/00; H10D84/201; H10D84/204; H10D84/221; H10D84/60; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A TELEPHONE SYSTEM COMPRISING A PLURALITY OF SUBSCRIBER LINES, A PLURALITY OF LINKS FOR CONTROLLING THE INTERCONNECTION OF SAID LINES, A PREDETERMINED NUMBER OF BUSSES COMMON TO SAID LINES AND LINKS, MEANS RESPONSIVE TO AN OFF-HOOK CONDITION ON ONE OF SAID LINES FOR SELECTIVELY MARKING CERTAIN OF SAID COMMON BUSSES DURING A FIXED PERIOD OF TIME, THE BUSSES THAT ARE MARKED CORRESPONDING TO THE CLASS OF SERVICE GIVEN TO THE OFF-HOOK LINE THAT MARKS SAID BUSSES, A SOURCE OF TIME FRAMES WHICH SEQUENTIALLY IDENTIFY AND ENABLE SAID LINKS, A PLURALITY OF BISTABLE CIRCUITS THERE BEING SAID PREDETERMINED NUMBER OF BISTABLE CIRCUITS IN EACH OF SAID LINKS CIRCUITS, MEANS FOR INDIVIDUALLY CONNECTING EACH OF SAID BISTABLE CIRCUITS TO A CORRESPONDING ONE OF SAID COMMON BUSSES, AND MEANS RESPONSIVE TO A COINCIDENCE BETWEEN A MARKING ON ANY OF SAID BUSSES AND A TIME FRAME IDENTIFYING ONE OF SAID
Claim 2
Dependent Claim
146 words
A TELEPHONE SYSTEM COMPRISING A PLURALITY OF SUBSCRIBER LINES, A PLURALITY OF LINKS FOR CONTROLLING THE INTERCONNECTION OF SAID LINES, A PREDETERMINED NUMBER OF BUSSES COMMON TO SAID LINES AND LINKS, MEANS RESPONSIVE TO AN OFF-HOOK CONDITION ON ONE OF SAID LINES FOR SELECTIVELY MARKING CERTAIN OF SAID COMMON BUSSES DURING A FIXED PERIOD OF TIME, THE BUSSES THAT ARE MARKED CORRESPONDING TO THE CLASS OF SERVICE GIVEN TO THE OFF-HOOK LINE THAT MARKS SAID BUSSES, A SOURCE OF TIME FRAMES WHICH SEQUENTIALLY IDENTIFY AND ENABLE SAID LINKS, A PLURALITY OF BISTABLE CIRCUITS THERE BEING SAID PREDETERMINED NUMBER OF BISTABLE CIRCUITS IN EACH OF SAID LINKS CIRCUITS, MEANS FOR INDIVIDUALLY CONNECTING EACH OF SAID BISTABLE CIRCUITS TO A CORRESPONDING ONE OF SAID COMMON BUSSES, AND MEANS RESPONSIVE TO A COINCIDENCE BETWEEN A MARKING ON ANY OF SAID BUSSES AND A TIME FRAME IDENTIFYING ONE OF SAID
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |