US2548723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone set hook-switch apparatus
Assignee: Kellogg Switchboard and Supply Co
•
Filing: 1945-07-13
•
Granted: 1951-04-10
•
Expires: 1965-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph F Houdek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:32
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/04; H04M1/06; H04M1/08; H04M1/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2008387A
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US2291808A
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US2226734A
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US2214259A
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US2199219A
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US2279713A
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US2333299A
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US2314225A
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US2375681A
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US2365481A
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US2369541A
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US2351459A
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US2495164A
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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) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |