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Patent US2485642A successfully refreshed from Google Patents.
US2485642A
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Electronic switching system
Assignee: STC PLC
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Filing: 1945-03-05
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Granted: 1949-10-25
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Expires: 1965-03-05
Abstract
No abstract record available.
Inventors
- 👤 John H Newltt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:45
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US92496A
Cited
US2213273A
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US2266509A
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US2213874A
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US2217957A
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US2264056A
Cited
US2360466A
Cited
US2300999A
Cited
US2366357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |