Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Reexamination Certificate
2011-07-12
2011-07-12
Zemel, Irina S (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
C521S146000, C521S147000, C296S065020, C296S187020, C296S187030, C296S146700, C296S153000
Reexamination Certificate
active
07977396
ABSTRACT:
Cushions for dynamic impact applications include anisotropic cellular polymers made in an extrusion, expanded bead or reactive foaming process. The anisotropic behavior represented by CE/CT, CV/CTand CH/CT, wherein CE, CVand CHrepresent the compressive strength of the cellular polymer in each of three orthogonal directions E, V and H, respectively, as measured by compressing a 25-50 mm thick sample of the cellular polymer at a strain rate of 0.08 s−1to 25% strain, CTrepresents the sum of CE, CVand CH, and at least one of CE/CT, CV/CTand CH/CThas a value of at least 0.40, up to about 0.80. The cellular polymer also preferably has density of 1.75 to 2.35 pounds/cubic foot and a compressive stress in the direction of maximum compressive strength of 290-600 kPa at 25% strain when used for headliner countermeasure applications. The cushions are useful in automotive applications such as automotive headliners, door panels, knee bolsters, pillars, headrests, seat backs, load floors or instrument panels.
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Berglund Charles A.
Maurer Myron J.
Paquet Andrew N.
Swartzmiller Steven B.
Vo Chau V.
Dow Global Technologies LLC
Gary C Cohn PLLC
Zemel Irina S
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