Number | Name | Date | Kind |
---|---|---|---|
4098773 | Illers et al. | Jul 1978 | |
4218543 | Weber et al. | Aug 1980 | |
4272618 | Dominguez et al. | Jun 1981 | |
4296212 | Ewen et al. | Oct 1981 | |
4374210 | Ewen et al. | Feb 1983 | |
4433067 | Rice et al. | Feb 1984 | |
4442235 | Taylor et al. | Apr 1984 |
Entry |
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McBrayer et al., J. of Cellular Plastics, Jul./Aug. 1977, p. 255. |