Patent US2496902A successfully refreshed from Google Patents.
US2496902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Private automatic telephone system of the passing call type
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1945-06-28
•
Granted: 1950-02-07
•
Expires: 1965-06-28
Abstract
No abstract record available.
Inventors
- 👤 John H Voss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:07
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1735575A
Cited
USRE17006E
Cited
US1855701A
Cited
US2056752A
Cited
US2087930A
Cited
US2265151A
Cited
US2289895A
Cited
US2335524A
Cited
US2332966A
Cited
US2380950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |