US2464353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic switching system
Assignee: RCA Corp
•
Filing: 1943-09-16
•
Granted: 1949-03-15
•
Expires: 1963-09-16
Abstract
No abstract record available.
Inventors
- 👤 Smith James Ernest
- 👤 Eugene R Shenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:06
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB356111A
Cited
US2055883A
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US2089430A
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US2140004A
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US2146862A
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US2221115A
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US2265868A
Cited
US2189317A
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US2272070A
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US2300999A
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US2324314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |