Number | Name | Date | Kind |
---|---|---|---|
3489618 | Holtzman | Jan 1970 | |
3692514 | Hydrean | Sep 1972 | |
3696499 | Dromsky | Oct 1972 | |
3884731 | Barkman et al. | May 1975 | |
3944396 | Chivinsky | Mar 1976 | |
4159918 | von Bogandy et al. | Jul 1979 | |
4162758 | Mikarai | Jul 1979 | |
4178417 | Oda et al. | Dec 1979 |
Number | Date | Country |
---|---|---|
54-28255 | Mar 1979 | JPX |
341849 | Jun 1972 | SUX |
Entry |
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Ulam, "Composite Tubing and Piping", Allegheny Ludlum Steel Corporation, Pittsburgh, Pa., 1961, 8 pp. |
"Composite Tubes for Recovery Boilers", Sandvik Steel Catalogue, May 1977, 5 pp. |