US3219265A
Expired / Lapsed
US
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Centrifuges, e.g., ultracentrifuges for the separation of gases
Assignee: Reactor Centrum Nederland
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Filing: 1961-03-14
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Granted: 1965-11-23
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Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Los Johannes
- 👤 Kelling Fridtjof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:20
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/08; B01; B01D; B01D59/00; B01D59/20; Y; Y10; Y10S; Y10S494/00; Y10S494/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL87740C
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US533316A
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US2733857A
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US3108955A
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US2553936A
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BE572830A
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FR1224098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |