Process for the production of a laminated sheet material
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF A LAMINATED SHEET MATERIAL INCLUDING A LAYER OF TEXTILE MATERIAL AND A MICROPOROUS LAYER OF HIGH-POLYMER PLASTIC MATERIAL WHEREIN THE SURFACE OF THE LAMINATE COMPRISES POLYMERIC MATERIAL HAVING A MICROPOROUS STRUCTURE PROVIDED WITH EMBOSSMENTS. IN THE PROCESS, A SOLUTION OF HIGH-POLYMER PLASTIC MATERIAL IS APPLIED TO A LIQUID-AND GAS-PERMEABLE AUXILIARY SHEET MATERIAL THE SURFACE OF WHICH HAS FINE PROJECTIONS OR DEPRESSIONS CORRESPONDING TO THE DESIRED EMBOSSMENTS, THE POLYMER IS PRECIPITATED ON THE AUXILIARY SHEET MATERIAL, A TEXTILE SHEET MATERIAL BEING APPLIED TO THE LAYER OF HIGH-POLYMER MATERIAL PRIOR TO PRECIPITATION OR SIMULTANEOUSLY THEREWITH, OR AFTERWARDS, AND THE LAMINATE OF POLYMER MICROPOROUS LAYER AND TEXTILE LAYER IS SEPARATED FROM THE AUXILIARY SHEET MATERIAL.
Inventors
- 👤 Ludwig Klenk
- 👤 Dieter Kaempgen
- 👤 Rolf Kersting
- 👤 Herbert Porrmann
Bibliographic Details
Claims Analysis
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |