Number | Name | Date | Kind |
---|---|---|---|
1928621 | Frede et al. | Oct 1933 | |
1978015 | Erdman | Oct 1934 | |
2116935 | Richard | May 1938 | |
2647639 | Grein | Aug 1953 | |
2661241 | Veneziano | Dec 1953 | |
2845091 | Neer | Jul 1958 | |
2917242 | Waldrum | Dec 1959 | |
3001534 | Grant, Jr. | Sep 1961 | |
3042553 | Kearney et al. | Jul 1962 | |
3077306 | Herzog | Feb 1963 | |
3121027 | Galanor | Feb 1964 | |
3408006 | Stanwood | Oct 1969 | |
3449772 | Werner | Jun 1969 | |
3586294 | Strong | Jun 1971 | |
3675252 | Ghiz | Jul 1972 | |
3834625 | Barthod-Malat | Sep 1974 | |
3878857 | Heibo | Apr 1975 | |
3953266 | Emond et al. | Apr 1976 | |
4214705 | Watts et al. | Jul 1980 | |
4244524 | Wellings | Jan 1981 | |
4289152 | Sable | Sep 1981 | |
4347979 | Matthews | Sep 1982 | |
4407678 | Furness et al. | Aug 1983 | |
4429429 | Altschul | Feb 1984 | |
4558479 | Greskovics et al. | Dec 1985 | |
4685947 | Furness et al. | Apr 1987 | |
4716917 | Schmidt | Jan 1988 |
Number | Date | Country |
---|---|---|
8706489.8 | May 1987 | DEX |
8218117 | Oct 1982 | FRX |
Entry |
---|
Taiho, "The Crude Oil Washing Process"--Jan. 1985. |