Number | Name | Date | Kind |
---|---|---|---|
2597159 | May et al. | May 1952 | |
3372147 | Heinrich et al. | Mar 1968 | |
3378466 | Coltharp et al. | Apr 1968 | |
3700640 | Cier | Oct 1972 |
Number | Date | Country |
---|---|---|
1,015,891 | Jan 1966 | UK |
Entry |
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Encyclopedia of Polymer Science and Technology, vol. 7, pp. 539-557. |