US 12370716

Here is a concise summary of US patent 12370716:

Title: Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method treating a wood substrate therewith, and a wood product produced therefrom

Assignee: Koppers Performance Chemicals Inc

Inventors: Min Kuang, Jun Zhang

Filing Date: March 6, 2025

Issue Date: July 29, 2025

Abstract: The patent describes a wood preservative composition containing 4,5-dichloro-2-octylisothiazol-3(2H)-one (DCOI) and a retaining additive. The retaining additive can be a solvent-borne polymeric resin, a wax, or a combination thereof. The composition contains at least 0.5% by weight of DCOI, and the weight ratio of DCOI to the retaining additive is between 1:5 and 5:1. The patent also covers a method for treating wood substrates with this composition and the resulting wood product.

Plain-Language Overview of Independent Claims:

• Claim 1 (Wood Preservative Composition): This claim defines a wood preservative liquid mixture. It must include 4,5-dichloro-2-octylisothiazol-3(2H)-one (DCOI) at a concentration of at least 0.5% of the total weight. Additionally, it must contain a "retaining additive." This additive can be a polymeric resin dissolved in a solvent, a wax, or a blend of both. The relative amounts of DCOI and the retaining additive, by weight, must be within a range of 1 part DCOI to 5 parts additive, up to 5 parts DCOI to 1 part additive.
• Claim 10 (Method of Treating Wood): This claim describes a process for protecting wood. The method involves applying the wood preservative composition (as defined in Claim 1) to a piece of wood. The application must continue for a sufficient duration to prevent the wood from decaying due to fungi.
• Claim 15 (Wood Product): This claim covers a physical wood item. This wood product is specifically created by treating a wood substrate with the wood preservative composition detailed in Claim 1.

Litigation Status:
The patent family is noted to have litigation. A PTAB (Patent Trial and Appeal Board) case, PGR2026-00023, has been filed and is currently pending. No specific CAFC (U.S. Court of Appeals for the Federal Circuit) dockets for 2026 were found for patent US12370716.