US2599097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiotelephone station identifying system
Assignee: AT&T Inc
•
Filing: 1948-12-30
•
Granted: 1952-06-03
•
Expires: 1968-12-30
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand S Entz
- 👤 Robert O Soffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:29
CPC Classifications
H; H04; H04W; H04W8/00; H04W8/26; H04M; H04M15/00; H04M15/08; H04W60/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB516615A
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US2206538A
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US2315798A
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US2232866A
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US2340798A
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US2444452A
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US2393291A
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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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |