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US3137801A
Expired / Lapsed
US
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Duoplasmatron-type ion source including a non-magnetic anode and magnetic extractor electrode
Assignee: High Voltage Engineering Corp
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Filing: 1960-09-22
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Granted: 1964-06-16
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Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Norman B Brooks
- 👤 Bertram S Quintal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:30
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02; H01J27/08; H01J27/10; H01J27/12
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |