Patent US2473535A successfully refreshed from Google Patents.
US2473535A
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US
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Switching and modulation system
Assignee: Unisys Corp
•
Filing: 1944-08-03
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Granted: 1949-06-21
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Expires: 1964-08-03
Abstract
No abstract record available.
Inventors
- 👤 Murphy Lauretta Maeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:16
CPC Classifications
H; H03; H03C; H03C7/00; H03C7/02; G; G01; G01S; G01S1/00; G01S1/02; H01; H01P; H01P1/00; H01P1/10; H01P1/12; H01P1/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2198025A
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US2227372A
Cited
US2241937A
Cited
US2266500A
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US2244756A
Cited
US2301163A
Cited
US2241976A
Cited
US2402663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |