Number | Name | Date | Kind |
---|---|---|---|
2899353 | Engel et al. | Aug 1959 | |
3042577 | Thomas | Jul 1962 | |
3243340 | Cadotte | Mar 1966 | |
3376189 | Nystrom | Apr 1968 | |
3536580 | Fave | Oct 1970 | |
3766002 | Grief et al. | Oct 1973 | |
3776812 | Jongetjes | Dec 1973 |
Number | Date | Country |
---|---|---|
850044 | Aug 1970 | CAX |
707946 | Apr 1954 | GBX |
1338759 | Nov 1973 | GBX |
Entry |
---|
Calkin, "Mod. Pulp & Papermaking," (1957), pp. 312, 313. |