Search Results for: Composition leather surface cases
clutches, gun wads, journal bearings, or liners for bearings, brakes or clutches, or material therefor, wherein a lubricant is a permanent part of the solid anti-friction device, article or material, whether by permanent coating, impregnation into the interstices thereof, or by being part of the composition
(class / ) silicon dioxide, silicic acid, orthosilicate, or metasilicate, including surface-treated (e.g., clays, onium clays, estersils, etc.)...
https://patents.justia.com/patents-by-us-classification/508