US2562123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telephone system
Assignee: Stromberg Carlson Corp
•
Filing: 1947-08-22
•
Granted: 1951-07-24
•
Expires: 1967-08-22
Abstract
No abstract record available.
Inventors
- 👤 Winfred T Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:30
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1723224A
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US1908365A
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US2023011A
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US2149646A
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US2200817A
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US2277586A
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US2409586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |