Did You Know...
...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 |
| 5061525 | Sizing method A cheese of fiber can be effectively sized with an aqueous emulsion of a cationic polymer, containing 0.2 to 20 g/l of a water-soluble salt, at 30° to 80° C. The polymer preferably includes a copolymer of a vinyl monomer and an unsaturated carboxylic ac... | 10/29/1991 |
| 3930293 | Method of replacing the transfer cores of yarn packages with resilient replacement cores A method for transferring a package of yarn supported by a transfer core to a replacement core including the steps of inserting the replacement core into the transfer core, removing the transfer core relative to the package of yarn and the replacement cor... | 01/06/1976 |
