Patent US2485351A successfully refreshed from Google Patents.
US2485351A
Expired / Lapsed
US
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Automatic telephone system
Assignee: Kellogg Switchboard and Supply Co
•
Filing: 1944-11-20
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Granted: 1949-10-18
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Expires: 1964-11-20
Abstract
No abstract record available.
Inventors
- 👤 John I Bellamy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:45
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1641285A
Cited
US1688588A
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US1831387A
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US1880072A
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US1886296A
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US2087398A
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US2081027A
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US2194072A
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US2272311A
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US2286431A
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US2285985A
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US2320885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |