US2438367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter-receiver switching system
Assignee: General Electric Co
•
Filing: 1942-10-24
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Granted: 1948-03-23
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Expires: 1962-10-24
Abstract
No abstract record available.
Inventors
- 👤 James E Keister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:22
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/034; H; H01; H01P; H01P1/00; H01P1/10; H01P1/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898180A
Cited
US2178299A
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US2205874A
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US2219922A
Cited
US2189549A
Cited
US2235010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |