US3008008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telephone system
Assignee: North Electric Co
•
Filing: 1957-05-16
•
Granted: 1961-11-07
•
Expires: 1977-05-16
Abstract
No abstract record available.
Inventors
- 👤 Robert E Pickett
- 👤 Charles H Willyard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:50
CPC Classifications
H; H04; H04Q; H04Q5/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2733296A
Cited
US1873255A
Cited
US2516763A
Cited
US2511617A
Cited
US2535446A
Cited
US2773934A
Cited
US2763726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |