US3037632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary filter with a prefiltering layer
Assignee: Ecremeuses Melotte SA
•
Filing: 1957-08-30
•
Granted: 1962-06-05
•
Expires: 1977-08-30
Abstract
No abstract record available.
Inventors
- 👤 Dujardin Albert Jean Ar Julien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:47
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/46; B01D33/461; B01D33/466; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US444231A
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US1076880A
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DE343790C
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US1803792A
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US1796491A
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US2102780A
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US2715466A
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US2798424A
Cited
US2887044A
Cited
US2839194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |