...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 6423866 | Production of aminohalogencrotonates Lower alkyl esters of 3-amino crotonates substituted by halogen in the C-4 position, e.g. ethyl 3-amino-4,4,4-trifluoro-crotonate, in which the amino group optionally may be substituted by one or two C1 to C3 alkyl groups or by one or two aryl groups, e.g... | 07/23/2002 |