Patent US3437266A successfully refreshed from Google Patents.
US3437266A
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US
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Centrifugal separation enhancement
Assignee: Sondell Research and Development Co
•
Filing: 1967-07-03
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Granted: 1969-04-08
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Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 James A Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:28
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0217; B01D21/00; B01D21/26; B01D21/262; B01D2221/00; B01D2221/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3075694A
Cited
US2271501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |