Patent US1663648A successfully refreshed from Google Patents.
Patent US3341663A successfully refreshed from Google Patents.
US3341663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone answering system
Assignee: AT&T Inc
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Filing: 1964-04-29
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Granted: 1967-09-12
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Expires: 1984-04-29
Abstract
No abstract record available.
Inventors
- 👤 Stefano Vincent R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:44
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/54; H04M3/546
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A TELEPHONE SYSTEM, IN COMBINATION, APPARATUS RESPONSIVE TO CYCLES OF RINGING CURRENT APPLIED TO A TELEPHONE SUBSCRIBER LINE, SIGNAL MEANS, COUNTING MEANS COMPRISING A PLURALITY OF CAPACITORS, MEANS RESPONSIVE TO A FIRST CYCLE OF RINGING CURRENT APPLIED TO A TELEPHONE SUBSCRIBER LINE TO CHARGE ONE OF SAID CAPACITORS, MEANS RESPONSIVE TO SUCCEEDING CYCLES OF RINGING CURRENT APPLIED TO SAID TELEPHONE SUBSCRIBER LINE TO TRANSFER A CHARGE FROM SAID ONE CAPACITOR TO OTHERS OF SAID CAPACITORS IN SUCCESSION, AND MEANS RESPONSIVE TO A CHARGE ON ONE OF SAID CAPACITORS TO ACTUATE SAID SIGNAL MEANS.
Claim 2
Dependent Claim
94 words
IN A TELEPHONE SYSTEM, IN COMBINATION, APPARATUS RESPONSIVE TO CYCLES OF RINGING CURRENT APPLIED TO A TELEPHONE SUBSCRIBER LINE, SIGNAL MEANS, COUNTING MEANS COMPRISING A PLURALITY OF CAPACITORS, MEANS RESPONSIVE TO A FIRST CYCLE OF RINGING CURRENT APPLIED TO A TELEPHONE SUBSCRIBER LINE TO CHARGE ONE OF SAID CAPACITORS, MEANS RESPONSIVE TO SUCCEEDING CYCLES OF RINGING CURRENT APPLIED TO SAID TELEPHONE SUBSCRIBER LINE TO TRANSFER A CHARGE FROM SAID ONE CAPACITOR TO OTHERS OF SAID CAPACITORS IN SUCCESSION, AND MEANS RESPONSIVE TO A CHARGE ON ONE OF SAID CAPACITORS TO ACTUATE SAID SIGNAL MEANS.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |