Patent US2668859A successfully refreshed from Google Patents.
US2820165A
Expired / Lapsed
US
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Means for cooling the windows of acceleration tubes for electrostatic generators
Assignee: High Voltage Engineering Corp
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Filing: 1953-09-09
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Granted: 1958-01-14
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Expires: 1973-09-09
Abstract
No abstract record available.
Inventors
- 👤 Denis M Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:41
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/50; A23B2/503; B; B01; B01J; B01J19/00; B01J19/08; B01J19/081; B01J19/085; H; H01; H01J; H01J5/00; H01J5/02; H01J5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR532781A
Cited
FR641134A
Cited
AT111958B
Cited
US2053002A
Cited
US2093288A
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US2161458A
Cited
US2374311A
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US2602751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |