US2478469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone set
Assignee: Kellogg Switchboard and Supply Co
•
Filing: 1946-04-03
•
Granted: 1949-08-09
•
Expires: 1966-04-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Earle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:45
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB344677A
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US1912653A
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US1936245A
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US2008283A
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US2066876A
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US2224902A
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US2291808A
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US2198894A
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US2199219A
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US2337692A
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US2369541A
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US2399753A
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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) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |