Method of applying a backing to a carpet and product
Abstract
Abstract A CARPET IS FORMED BY ADHERING A SECONDARY BACKING TO A PRIMARY BACKING WITH A THIXOTROPIC POLYURETHANE COMPOSITION SO THAT THERE IS SUBSTANTIALLY COMPLETE SATURATION OF THE BUNDLE WRAP WITH THE COMPOSITION WITHOUT PERNETRATION THROUGH THE PRIMARY BACKING. THE COMPOSITION CONTAINS WATER, A POLYOL WITH A HYDROXYL NUMBER LESS THAN 100, A DIISOCYANATE, A FILLER AND A CATALYST AND HAS AN INITIAL VISCOSITY OF BETWEEN 30,000 AND 1008000 CPS. #7 SPINDLE BROOKFIELD RVF, A POT LIFE OF BETWEEN 10 AND 60 SECONDS AND IS EXPANDABLE BETWEEN 100 AND 400 WHEN COMPLETELY REACTED. IT IS APPLIED TO THE UNDERSIDE OF THE PRIMARY BACKING WITH A DOCTOR KNIFE AND HEATED. A SECONDARY BACKING IS APPLIED TO THE UNCURED COMPOSITION AFTER IT IS SPREAD ON THE PRIMARY BACKING AND THE RESULTANT LAMINATE IS SUBJECTED TO PRESSURE PRIOR TO CURING TO DISINTEGRATE SUBSTANTIALLY ALL OF THE CELLS IN THE POLYURETHANE.
Inventors
- 👤 Claude Edward Terry
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |