US3834869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for dispersing fibers in suspension including air laying web,conditioning fibers in web,dispersing web in liquid
Assignee: Creusot Loire SA
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Filing: 1972-07-20
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Granted: 1974-09-10
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Expires: 1992-07-20
Abstract
Abstract A METHOD AND APPARATUS FOR IMPROVED DISPERSION OF FIBRES OR PARTICLES INTO A LIQUID SUSPENSION COMPRISES THE STEPS OF FIRST FINELY DISPERSING THE FIBRES OR PARTICLES IN A GAS OR VAPOUR CURRENT DEPOSITING THE DISPERSED FIBRES OR PARTICLES ON A MOVING FORAMINOUS SUPPORT AND SUBMERGING THE SUPPORT WITH DEPOSITED FIBRES OR PARTICLES IN A LIQUID BATH. THE DISPERSING STEP MAY INCUDE MECHANICAL DISPERSION FOLLOWED BY ENTRAINMENT OF THE DISPERSED FIBRES OR PARTICLES IN THE GASEOUS STREAM. THE MOVING SUPPORT MAY BE A SINGLE FORAMINOUS SCREEN, DOUBLE FORAMINOUS SCREENS, OR A PERFORATED CYLINDER.
Inventors
- 👤 B Ancelle
- 👤 P Lejuene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:57
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/72; D04H1/732; D04H1/736; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21F; D21F1/00; Y; Y10; Y10S; Y10S68/00; Y10S68/903
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |