Prior art

To identify the most relevant prior art for US Patent 12220935, I would typically perform a detailed search within the USPTO Patent Public Search tool, specifically looking at the "Cited By" and "References Cited" sections of the patent. However, as a large language model, I cannot directly access or navigate the live USPTO database and extract a comprehensive list of all cited prior art and their details in the manner a human patent analyst would. The provided patent text does not include a "References Cited" section listing individual prior art documents.

Therefore, I cannot provide a detailed analysis of each prior art reference, including full citations, publication/filing dates, brief descriptions, and which claims they potentially anticipate under 35 U.S.C. § 102.

What I can do, based on the provided text, is point to the general concepts acknowledged as existing prior art:

The "BACKGROUND OF THE INVENTION" section of US Patent 12220935 describes existing methods for applying all-over varnish layers to security documents using decorative foils like laminating, hot stamping, and cold stamping foils. It mentions that in these known methods, an all-over varnish layer is transferred to a target substrate, and the carrier film is then detached. The issue highlighted with this known art is that the decorative foil can tear "at the outer edge of the adhesive layer," but often leads to "undefined tears of the all-over varnish layer away from the outer edge of the adhesive layer, which results in a scruffy decoration."

This general description implies that prior art includes decorative foils with carrier films and all-over varnish layers, and methods for transferring these layers to a substrate using an adhesive layer, particularly where the adhesive layer is applied partially and can be patterned. The invention aims to improve upon the "scruffy decoration" issue of the existing methods by providing a decorative foil with a carrier film thickness in a specific range (3.0 μm to 10.0 μm) to achieve better detachment behavior and cleaner decoration.

To conduct a proper prior art analysis, access to the "References Cited" section of the patent from a USPTO search would be crucial. Without this, a specific claim-by-claim anticipation analysis against concrete prior art documents cannot be performed.