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US2904720A
Expired / Lapsed
US
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Ion accelerator
Assignee: Individual
•
Filing: 1953-11-23
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Granted: 1959-09-15
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Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 Bell John Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:01
CPC Classifications
H; H05; H05H; H05H9/00; H05H9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985093A
Cited
US2212640A
Cited
US2200039A
Cited
US2245670A
Cited
US2187149A
Cited
FR870171A
Cited
US2520813A
Cited
US2743366A
Cited
US2844753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |