Patent US3676243A successfully refreshed from Google Patents.
US3676243A
Expired / Lapsed
US
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Process for the production of fleeces
Assignee: Lenzing AG
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Filing: 1970-11-18
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Granted: 1972-07-11
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Expires: 1990-11-18
Abstract
Abstract THE INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF FLEECES, IN WHICH THREADS ARE DEPOSITED ON A PERFORATED, MOVING SUPPORT WHICH IS SUBJECTED TO SUCTION, AND THE FLEECE SO PRODUCED IS COMPACTED MECHANICALLY, THERMALLY OR BY GLUEING. THE IMPROVEMENT RESIDES IN THAT THE THREADS ARE GUIDED TO THE SUPPORT AS A SERIES OF THREADS ARRANGED IN ONE PLANE AND PARALLEL TO EACH OTHER, SAID SERIES BEING OBTAINED BY CUTTING A POLYMER FOIL AND SIMULTANEOUSLY STRETCHING THE THREADS WHILE THEY ARE BEING MADE. THUS EACH INDIVIDUAL THREAD MAY FORM A LOOP SO THAT A HIGHLY DENSE, UNIFORMLY TANGLED ARRANGEMENT IS OBTAINED.
Inventors
- 👤 Franz Sasshofer
- 👤 Johannes Krassig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:07
CPC Classifications
D; D04; D04H; D04H13/00; D04H13/02; D04H3/00; D04H3/08; D04H3/10; D04H3/105; D04H3/12; D04H3/14; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |