US2488153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable telephone extension
Assignee: Individual
•
Filing: 1947-03-04
•
Granted: 1949-11-15
•
Expires: 1967-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jay D Wiener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:42
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/72502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129332A
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US2098286A
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US2237457A
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US2292222A
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US2248746A
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US2296101A
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US2369230A
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US2401333A
Cited
US2407417A
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US2454498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |