Number | Name | Date | Kind |
---|---|---|---|
2018074 | Layte | Oct 1935 | |
2042537 | Liddell | Jun 1936 | |
2188643 | Laderer | Jan 1940 | |
2383672 | Neisingh | Aug 1945 | |
2826309 | Forman et al. | Mar 1958 |
Number | Date | Country |
---|---|---|
2350488 | Apr 1975 | DEX |
Entry |
---|
Jones, J. I. Part 2-High Temperature Resistant Fibres from Organic, Polymeric Precursors, In Filtration & Separation, 7(3): p. 303, May/Jun. 1970. |