Patent US2085761A successfully refreshed from Google Patents.
Patent US3729374A successfully refreshed from Google Patents.
US3729374A
Expired / Lapsed
US
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Production of a fibrous web between an endless belt and an endless permeable belt
Assignee: Papeteries Navarre SA
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Filing: 1971-02-17
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Granted: 1973-04-24
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Expires: 1991-02-17
Abstract
Abstract PRCESS FOR THE PRODUCTON OF AWEB OR CARRIER OF FIBROUS ELEMENTS COMPRISING PLACING ASUSPENSION OF FIBRES IN A LIQUID BATH, CAUSING A FLOW OF THE SUSPENSION THROUGH A PART OF THE BATH HAVING A PROGRESSIVELY DECREASING WIDTH TO CONCENTRATE THE SUSPENSION AND CAUSING THE CONCENTRATED SUSPENSION TO BE ADVANCED BETWEEN TWO TRAVELLING BELTS TO FRM THE WEB OR CARRIER.
Inventors
- 👤 H Lissalde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:28
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; D21F9/00; D21F9/003
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |