Number | Name | Date | Kind |
---|---|---|---|
3308508 | Schrenk | Mar 1967 | |
3337914 | Corbett | Aug 1967 | |
3809515 | Farrell | May 1974 | |
4167383 | Murakami et al. | Sep 1979 | |
4182603 | Knittel | Jan 1980 | |
4185954 | Murakami et al. | Jan 1980 | |
4285656 | Herrington | Aug 1981 | |
4298325 | Cole | Nov 1981 | |
4798526 | Briggs et al. | Jan 1989 |
Number | Date | Country |
---|---|---|
0252388 | Jan 1988 | EPX |
0063371 | Dec 1988 | JPX |
0004898 | Jan 1989 | JPX |
Entry |
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Patent Abstracts of Japan, vol. 5, No. 72 (M-68)[744], 14th May, 1981; & JP-A-56 24 133 (Asahi Dow K.K.) 07-08-1979. |