Patent US3362533A successfully refreshed from Google Patents.
US3362533A
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Process for the filtration of artificial silk and synthetic foil spinning materials by means of filter surfaces to which an alluvial medium is applied
Assignee: Chemap AG
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Filing: 1964-05-28
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Granted: 1968-01-09
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Hans Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:14
CPC Classifications
D; D01; D01F; D01F13/00; D01F13/02; B; B01; B01D; B01D37/00; B01D37/02; B01D37/04; B01D39/00; B01D39/02; B01D39/04; B01D41/00; B01D41/02; B01D41/04; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/261; B01J20/30; B01J20/34; B01J20/3425; B01J20/345; B01J20/3458; B01J20/3466; B01J20/3475; D01D; D01D1/00; D01D1/10; D01D1/106; D21; D21D; D21D5/00; D21D5/02; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y02P70/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA622599A
Cited
US3023893A
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US2020693A
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US2055869A
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US2607954A
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FR1190296A
Cited
US2971648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |