Appeal 2007-1905
Reissue Application 10/931,249
Patent 6,444,720 B1
1 Okada also describes foams said to have been made according to its
2 invention and reports closed cell contents of 0, 0, and 0. See Examples 7-9.
3 Page 13.
4
5 Heuvelsland
6 Heuvelsland described a process for preparing polyols with reduced
7 unsaturation. Col. 2:14-17; col. 10:19-23.
8 A polyol with reduced unsaturation is a polyol with a reduced number
9 of carbon-carbon double bonds.
10 Catalysts, including alkali earth metals, barium and strontium can be
11 used to make the polyols. Col. 2:16-17; col. 4:41-47.
12 Polyols made by the Heuvelsland process are said to be useful for
13 producing polyurethane polymers, both cellular and non-cellular.
14 Col. 5:30-32; col. 5:46-53.
15 Among other uses, the polyurethanes are said to be useful for making
16 molded foam and in insulative applications. Col. 5:49-50.
17 Like Bayer's urethane foam, the polyurethanes are made by reaction
18 of the polyol with a polyisocyanate, optionally in the presence of a catalyst.
19 Col. 5:32-39.
20 Polyurethanes made from the Heuvelsland polyols are said to show
21 improved foam color (meaning less discoloration), compressive and tensile
22 strengths, flexural modulus and processing properties due to the lower
23 unsaturation levels of the polyol. Col. 5:53-58.
10
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