Federal Circuit Upholds Invalidation of Sherwin-Williams’ Paint Patents in Challenge by PPG

The Federal Circuit has upheld the invalidation of Sherwin-Williams’ paint patents following a legal challenge by industry competitor PPG. At trial, PPG contended that it had developed the technology in question over twenty years ago, challenging the validity of Sherwin-Williams’ patents on these grounds. For a detailed account of the case proceedings, refer to the original article.