US2824259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Virtual flood-electron source
Assignee: Raytheon Co
•
Filing: 1955-06-06
•
Granted: 1958-02-18
•
Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Henry M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/18; H01J29/00; H01J29/02; H01J29/46; H01J29/48; H01J29/488
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2186393A
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US2195505A
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US2315367A
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US2452044A
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US2719936A
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US2738440A
Cited
US2728872A
Cited
US2748312A
Cited
US2808526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |