US3014989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incoming telephone call pabx restrictive service
Assignee: Automatic Electric Laboratories Inc
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Filing: 1959-06-10
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Granted: 1961-12-26
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Expires: 1979-06-10
Abstract
No abstract record available.
Inventors
- 👤 Lester L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:25
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/38
Claims Analysis
Total Claims: 0
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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) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |