US3420960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for telephone line scanning
Assignee: AT&T Inc
•
Filing: 1965-05-14
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Granted: 1969-01-07
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Expires: 1985-05-14
Abstract
No abstract record available.
Inventors
- 👤 John Z Jacoby
- 👤 Frank S Vigliante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:55
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54575; H04Q3/54591
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3349188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |