Patent US2369071A successfully refreshed from Google Patents.
US2369071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1939-06-12
•
Granted: 1945-02-06
•
Expires: 1959-06-12
Abstract
No abstract record available.
Inventors
- 👤 Ostline John Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:46
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/04; H04Q; H04Q3/00; H04Q3/0016; H04Q3/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1948-02-06 | 1948-08-07 | 1949-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-02-06 | 1952-08-07 | 1953-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-02-06 | 1956-08-07 | 1957-02-06 | $7700.00 | Window Closed / Lapsed |