Number | Date | Country | Kind |
---|---|---|---|
2822072 | May 1978 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2123832 | Jaeger et al. | Jul 1938 | |
2395472 | Fernald et al. | Feb 1946 | |
2580417 | Follett et al. | Jan 1952 | |
2639967 | Rudy | May 1953 | |
3010780 | Plapper et al. | Nov 1961 | |
3356450 | Heinze | Dec 1967 | |
4042321 | Backer et al. | Aug 1977 | |
4071377 | Schwuger et al. | Jan 1978 | |
4089929 | Christophliemk et al. | May 1978 | |
4101271 | Bockelman et al. | Jul 1978 | |
4126413 | Traubel et al. | Nov 1978 | |
4126574 | Reinwald et al. | Nov 1978 |
Number | Date | Country |
---|---|---|
2535283 | Apr 1976 | DEX |
2271290 | Dec 1975 | FRX |
Entry |
---|
Chemical Abstracts, vol. 69, (1968), No. 20430t. |