Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Reexamination Certificate
2002-12-18
2009-12-22
Cooney, John (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
C521S164000, C521S167000, C521S170000, C521S172000, C521S173000, C521S174000
Reexamination Certificate
active
07635723
ABSTRACT:
A method for producing a rigid, closed-cell polyurethane foam having a free-rise density of from about 1.3 lbs/ft.3 to about 4 lbs/ft.3 and exhibiting a shrinkage of less than 10%, comprises mixing together an isocyanate, at least one alkyl alkanoate blowing agent and at least one polyol having a hydroxyl number of from about 150 to about 800 and being selected from the group consisting of polyalkoxylated amines, polyalkoxylated ethers, and polyester polyols, to form a reaction mixture that is curable to produce such foam.
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Kalinowski Timothy T.
Keske David G.
Matimba Victor
Modray David L.
Schulte Mark
Cooney John
Foam Supplies, Inc.
Sonnenschein Nath and Rosenthal LLP
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