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US2925504A
Expired / Lapsed
US
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High-vacuum pumps for high-voltage acceleration tubes
Assignee: High Voltage Engineering Corp
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Filing: 1957-06-17
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Granted: 1960-02-16
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Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Robert W Cloud
- 👤 John G Trump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:40
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2332428A
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US2540647A
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US2636664A
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US2640948A
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US2656489A
Cited
US2838708A
Cited
US2796555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |