US2484612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directory number calling line identifier
Assignee: AT&T Inc
•
Filing: 1946-05-17
•
Granted: 1949-10-11
•
Expires: 1966-05-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Dehn
- 👤 William H T Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/08; Y; Y10; Y10S; Y10S84/00; Y10S84/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1690206A
Cited
US1663747A
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US1841084A
Cited
US2005595A
Cited
US2226459A
Cited
US2084105A
Cited
US2153179A
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US2267950A
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US2319424A
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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) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |