Number | Name | Date | Kind |
---|---|---|---|
2613154 | Montgomery | Oct 1952 | |
2735155 | Glaser | Aug 1951 | |
2957754 | Nicholson | Oct 1960 | |
3052538 | Jech et al. | Oct 1962 | |
3096149 | Gruber | Jul 1963 | |
3244482 | Culbertson et al. | Apr 1966 | |
3249401 | Wood | May 1966 | |
3328127 | Byrns | Jun 1967 | |
3377141 | Hardy | Apr 1968 | |
3488291 | Hardy | Jan 1970 | |
3520656 | Meadows | Jul 1970 | |
3775271 | Brannan | Nov 1973 | |
4056602 | Matovich | Nov 1977 | |
4266977 | Steiger | May 1981 | |
4301020 | Johnson, Jr. et al. | Nov 1981 | |
5047372 | Parrish et al. | Sep 1991 | |
5059563 | Khazai et al. | Oct 1991 |
Number | Date | Country |
---|---|---|
1273523 | May 1972 | GBX |
Entry |
---|
Schwarzkopf et al, Refractory Hard Metals, pp. 277, 282, and 285, MacMillan Company, N.Y., 1953. |
Ceramic Science Proc. 6 (9-10), 1313-20, 1985. |