Flexible polyurethane foam composition
Abstract
Abstract A POLYURETHANE FOAM COMPOSITION IS AFFORDED WHICH MAY ECONOMICALLY BE USED AS A SUBSTITUTE FOR POLYURETHANE FOAM SCRAP IN THE MANUFACTURE OF REBONDED POLYURETHANE FOAM PRODUCTS. THE POLYURETHANE FOAM COMPOSITION HAS UNIFORMLY DISPERSED THEREIN FROM ABOUT 100% TO ABOUT 200%, BASED ON THE WEIGHT OF THE POLYOL CONTENT OF THE FOAMED POLYURETHANE, OF PULVERULENT LIMESTONE, THE AVERAGE PARTICLE DIAMETER OF WHICH IS FROM ABOUT 5 TO ABOUT 100 MICRONS. THE RESULTING FOAM COMPOSITION CONFORMS TO THAT WHICH IS REQUIRED FOR THE AFORESAID PURPOSE IN THAT IT HAS A DENSITY OF FROM ABOUT 2.25 TO ABOUT 3.75 LBS./CU. FT. COMBINED WITH AN INDENTATION LOAD DEFLECTION VALUE OF ABOUT 55 TO ABOUT 100 LBS. IT ALSO HAS A TENSILE STRENGTH OF ABOUT 8 TO ABOUT 14 LBS./SQ. IN. AND A TEAR STRENGTH OF ABOUT 0.5 TO ABOUT 1.5 LBS./IN.
Inventors
- 👤 I Schwarz
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |