US2985756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionic bombardment cleaning apparatus
Assignee: Edwards High Vacuum Ltd
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Filing: 1958-12-05
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Granted: 1961-05-23
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Expires: 1978-12-05
Abstract
No abstract record available.
Inventors
- 👤 Holland Leslie Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/32431; H01J37/32623
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2373639A
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US2383469A
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US2465713A
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US2434930A
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US2642535A
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US2702863A
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US2887411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |