Patent US2987843A successfully refreshed from Google Patents.
Patent US3679542A successfully refreshed from Google Patents.
US3679542A
Expired / Lapsed
US
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Method of treating suspension of fibers to form fibrous aggregates
Assignee: BREVETS GRANOFIBRE SEBREG SOC
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Filing: 1970-04-01
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Granted: 1972-07-25
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Expires: 1990-04-01
Abstract
Abstract A SUSPENSION OF FIBERS IS TREATED TO FORM AGGREGATES BY SUBJECTING A SUSPENSION OF THE FIBERS IN A LIQUID TO ROTATIONAL AGITATION TO ESTABLISH A SPEED GRADIENT BETWEEN POINTS IN THE SUSPENSION CAUSING THE FORMATION OF EDDYS, WHICH RESULT IN THE FIBERS MOVING TOGETHER INTO GROUPS. THE GROUPED FIBERS CLING TO ONE ANDOTHER TO FORM AGGREGATES, THE CONCENTRATION BY WEIGHT OF THE FIBERS IN THE SUSPENSION AT THE BEGINING OF THE TREATMENT BEING RELATIVELY LOW.
Inventors
- 👤 Guy Jacquelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:42
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |