US2947906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay line
Assignee: Northrop Grumman Systems Corp
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Filing: 1955-07-29
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Granted: 1960-08-02
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Litton Charles Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:39
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/40; H01J23/00; H01J23/02; H01J23/08; H01J23/083; H01J23/16; H01J23/24; H01J23/26; H01J23/30; H01J23/36; H01J23/40; H01J23/48; H01J23/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |