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US3395801A
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US
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Filtration process
Assignee: Chemap AG
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Filing: 1964-05-25
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Granted: 1968-08-06
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Muller Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:35
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/41; B01D25/00; B01D25/28; B01D29/62; B01D29/70; B01D29/74; B01D33/00; B01D33/15; B01D33/17; B01D33/58; B01D33/62; B01D33/66; B01D33/663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |