US2520447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for accelerating electrically charged particles, such as electrons and ions
Assignee: BBC Brown Boveri AG Germany
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Filing: 1948-06-15
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Granted: 1950-08-29
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Expires: 1968-06-15
Abstract
No abstract record available.
Inventors
- 👤 Wideroe Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
H; H05; H05H; H05H13/00; H05H13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2242888A
Cited
US2398162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |