Patent US3781393A successfully refreshed from Google Patents.
US3781393A
Expired / Lapsed
US
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Process for the continuous production of a random-filament fleece
Assignee: Bayer AG
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Filing: 1971-07-15
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Granted: 1973-12-25
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Expires: 1991-07-15
Abstract
Abstract Process for forming a random-filament fleece by supplying filaments to a trumpet-shaped aerodynamic takeoff which throws the filaments against a collecting means where the filaments adhere to form a tubular fleece.
Inventors
- 👤 K Feltgen
- 👤 G Espanion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:34
CPC Classifications
D; D01; D01D; D01D5/00; D04; D04H; D04H3/00; D04H3/02; D04H3/07; D04H3/08; D04H3/16
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |