Patent US3231182A successfully refreshed from Google Patents.
US3231182A
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Centrifugal fluid purifier and filter bypass indicator combination
Assignee: Aero Flow Dynamics Inc
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Filing: 1963-06-28
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Granted: 1966-01-25
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 George T Downey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:55
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/04; B01; B01D; B01D21/00; B01D21/26; B01D21/262; B01D29/00; B01D29/11; B01D29/117; B01D29/50; B01D29/52; B01D29/54; B01D35/00; B01D35/14; B01D35/143; B01D35/147; B04B1/00; B04B1/04; B04B1/06; B04B5/00; B04B5/005; Y; Y10; Y10S; Y10S116/00; Y10S116/42; Y10S494/00; Y10S494/901; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1050622A
Cited
US2220706A
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US2617535A
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US2729339A
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US3077854A
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US3029836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |