Number | Date | Country | Kind |
---|---|---|---|
54-78317 | Jun 1979 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4220637 | Audibert et al. | Sep 1980 |
Entry |
---|
Derwent Abstracts No. 41683, Belgium Pat. No. 849214, 1977. |
Chedid, L., et al., Proc. Natl. Acad. Sci., vol. 74, pp. 2089-2093, 1977. |