US2918599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron velocity modulation tubes
Assignee: International Standard Electric Corp
•
Filing: 1955-06-20
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Granted: 1959-12-22
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Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Beck Arnold Hugh William
- 👤 Mengel Gaston Pakenham De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:13
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/06; H01J25/08; H01J23/00; H01J23/02; H01J23/11; H01J25/10; H01J25/20; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22580E
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US2463267A
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US2422695A
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US2423968A
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US2547061A
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US2824997A
Cited
GB716707A
Cited
US2767259A
Cited
US2824289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |