Patent US3424674A successfully refreshed from Google Patents.
US3424674A
Expired / Lapsed
US
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Upflow filtration of fluids
Assignee: Sybron Transition Corp
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Filing: 1966-05-10
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Granted: 1969-01-28
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Expires: 1986-05-10
Abstract
No abstract record available.
Inventors
- 👤 Paul J Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:48
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/28; B01D24/36; B01D24/46; B01D24/4668; B01D24/4673; B01D24/4684; B01D24/4689
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US468984A
Cited
US2057887A
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US2572848A
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US2742381A
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US2758070A
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US2925382A
Cited
US3122594A
Cited
US3305096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |