In the realm of collectible coins, "patterns" refer to trial pieces or experimental coins that were minted to test new designs or compositions before official production. The 1853 patterns are notable examples from the United States, particularly relating to changes in coinage during that period. These coins often feature unique designs or alterations to standard issue coins and are highly sought after by collectors for their historical significance and rarity. The 1853 patterns can involve various denominations and materials, showcasing the evolving nature of American coinage in the mid-19th century.