US3216655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously operating ultracentrifuges
Assignee: Individual
•
Filing: 1961-02-13
•
Granted: 1965-11-09
•
Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Wind Jaap
- 👤 Los Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
F; F16; F16C; F16C39/00; F16C39/06; F16C39/063; B; B01; B01D; B01D53/00; B01D53/24; B01D59/00; B01D59/20; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; B04B5/08; B04B9/00; B04B9/12; F16C17/00; F16C17/04; F16C17/08; F16C27/00; F16C27/02; F16C32/00; F16C32/04; F16C32/0406; F16C32/0408; F16C32/041; F16C32/0412; Y; Y10; Y10S; Y10S494/00; Y10S494/90; Y10T; Y10T74/00; Y10T74/21; Y10T74/2109
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563550A
Cited
US2733857A
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US2139715A
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US2256937A
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DE833487C
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US2551815A
Cited
GB561795A
Cited
US2681835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |