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 16:23
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1735575A
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USRE17006E
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US1855701A
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US2056752A
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US2087930A
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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 |