US3143601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic number intercept identification system
Assignee: AT&T Inc
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Filing: 1962-09-20
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Granted: 1964-08-04
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Expires: 1982-09-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Amos E Joel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A TELEPHONE SWITCHING SYSTEM COMPRISING A LOCAL OFFICE INCLUDING A CALLING LINE AND A CALLED LINE EACH HAVING DISTINCT DIRECTORY NUMBERS, IDENTIFICATION EQUIPMENT AT SAID LOCAL OFFICE OPERATIVE TO IDENTIFY THE DIRECTORY NUMBER OF SAID CALLING LINE, SWITCHING MEANS RESPONSIVE TO THE DIRECTORY NUMBER OF SAID CALLED LINE FOR ESTABLISHING CONNECTIONS TO SAID CALLED LINE, MEANS FOR INTERCEPTING CALLS TO SAID CALLED LINE, AND MEANS UNDER CONTROL OF SAID
Claim 2
Dependent Claim
69 words
A TELEPHONE SWITCHING SYSTEM COMPRISING A LOCAL OFFICE INCLUDING A CALLING LINE AND A CALLED LINE EACH HAVING DISTINCT DIRECTORY NUMBERS, IDENTIFICATION EQUIPMENT AT SAID LOCAL OFFICE OPERATIVE TO IDENTIFY THE DIRECTORY NUMBER OF SAID CALLING LINE, SWITCHING MEANS RESPONSIVE TO THE DIRECTORY NUMBER OF SAID CALLED LINE FOR ESTABLISHING CONNECTIONS TO SAID CALLED LINE, MEANS FOR INTERCEPTING CALLS TO SAID CALLED LINE, AND MEANS UNDER CONTROL 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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |