Number | Date | Country | Kind |
---|---|---|---|
2737402 | Aug 1977 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2838511 | Kogon | Jun 1958 | |
3210339 | Schwarze et al. | Oct 1965 |
Number | Date | Country |
---|---|---|
955511 | Apr 1964 | GBX |
Entry |
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Saunders and Frisch, "Polyurethanes: Chemistry and Technology", vol. 1, Chemistry of High Polymers Series, vol. XVI, (1962). |