Number | Name | Date | Kind |
---|---|---|---|
3397700 | Harlow et al. | Aug 1968 | |
3738375 | Doumas | Jun 1973 | |
4119105 | Owens | Oct 1978 | |
4874004 | Borowski et al. | Oct 1989 | |
4924886 | Litzinger | May 1990 | |
5115823 | Keritsis | May 1992 |
Number | Date | Country |
---|---|---|
1579891 | Aug 1969 | FRX |
Entry |
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Leffingwill et al., Tobacco Flavoring for Smoking Products, RJ Reynolds Tobacco Co. 1972, pp. 63-64. |