US2684158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous horizontal rotary filter of the tilting cell type
Assignee: Industrial and Financial Association Inc
•
Filing: 1950-10-26
•
Granted: 1954-07-20
•
Expires: 1970-10-26
Abstract
No abstract record available.
Inventors
- 👤 Delruelle Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:09
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/17; B01D33/19; B01D37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US877000A
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US830388A
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US938636A
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US938378A
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US978381A
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US1028789A
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US1335695A
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US1882045A
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US2188840A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |