US2443623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmitting and indicating system
Assignee: AT&T Inc
•
Filing: 1942-07-22
•
Granted: 1948-06-22
•
Expires: 1962-07-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter Koenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/18; G01G23/36; G08; G08C; G08C19/00; G08C19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1967331A
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US2089701A
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US2308645A
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US2121586A
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US2148817A
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US2374439A
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US2294156A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |