Number | Name | Date | Kind |
---|---|---|---|
2858211 | Durant et al. | Oct 1958 | |
3471366 | Reinhall | Oct 1969 | |
3530034 | Erikson | Sep 1970 | |
3743572 | Richter | Jul 1973 | |
3843468 | Laakso | Oct 1974 | |
3849247 | Richter | Nov 1974 | |
3963561 | Richter | Jun 1976 | |
4093511 | Richter | Jun 1978 | |
4637878 | Richter et al. | Jan 1987 |
Number | Date | Country |
---|---|---|
974341 | Nov 1964 | GBX |
Entry |
---|
Kamyr Pulp Equipment publication; Feb., 1972; pp. 8 through 43; Illustration of conventional prior art digesters, pp. 1 through 5. |