US2434259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement utilizing a plurality of electron discharge devices
Assignee: AT&T Inc
•
Filing: 1943-06-22
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Granted: 1948-01-13
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Expires: 1963-06-22
Abstract
No abstract record available.
Inventors
- 👤 Everett T Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:25
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G01S13/70; G05; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958245A
Cited
US2008364A
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US2068490A
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US2156534A
Cited
US2150265A
Cited
US2175017A
Cited
GB546677A
Cited
US2266052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |