Patents & IP
Concord Fiber Group has developed a portfolio of patented technologies for carbon-sequestering, environmentally friendly construction boards. Material composition and multiple feedstocks allow for a tailored approach to producing our composite hemp boards, which utilize hemp biomass, binders, and reclaimed feedstocks at different loading levels to achieve varying performance characteristics based on application requirements.
These composite boards can be engineered to include a wide range of attributes — waterproof, insulative, sound-deadening, mold and mildew resistant, lightweight, and fireproof. They can be used as exterior or interior wall coverings, underlayment beneath roofs and floors, decking, fencing, or components in furniture.
These extruded boards offer significant technical advancements over the limitations of currently available construction boards. Importantly, the ingredient mix can be easily adapted to regional or market conditions and specific applications — for example, an aramid fiber layer for enhanced impact resistance in military housing, or an additional foam layer for areas prone to severe weather.
As such, we believe these composite boards represent a smarter alternative to traditional construction boards in performance, flexibility, lifespan, sustainability, and cost.
Our intellectual property spans both the composite materials themselves and the manufacturing processes used to produce them at scale.
Our Patents
Co-Extruded Hemp Composite Board Product Patent (CHB)
Status: Issued | U.S. Patent 12,654,355 | Issued May 16, 2026 | Filed May 26, 2023
This patent covers a multi-layer composite board in which each layer can be independently engineered with different material compositions, densities, fiber contents, and additives. The technology allows manufacturers to tailor product performance to specific applications, building codes, environmental conditions, and regional market requirements while utilizing a common manufacturing platform.
For example, a board intended for the humid climate of South Florida can be optimized for moisture resistance, mold prevention, and dimensional stability, while a board produced for the Western United States can be engineered for enhanced fire resistance and wildfire resilience. Other formulations can prioritize structural strength, impact resistance, thermal performance, weight reduction, or cost optimization.
Extruded Hemp Composite Board Product Patent (EHB)
Status: Issued | U.S. Patent 12,269,953 | Issued April 8, 2025 | Filed May 26, 2023
This patent covers a structural composite board manufactured from industrial hemp fibers or hurds combined with thermoplastic binders to create a durable, moisture-resistant alternative to traditional wood-based panels. Unlike plywood, OSB, and particleboard, the board is not dependent on wood fiber and can be engineered to resist rot, mold, insects, and moisture-related degradation while utilizing renewable agricultural feedstocks. The invention provides a scalable platform for producing construction, industrial, and specialty boards with improved durability and environmental performance using conventional extrusion manufacturing processes.
Extruded Hemp Composite Board Method Patent (EHB)
Status: Issued | U.S. Patent 12,269,927 | Issued April 8, 2025 | Filed May 26, 2023
This patent protects the proprietary extrusion process used to manufacture Engineered Hemp Board (EHB), enabling hemp fibers or hurd (cellulose) to be efficiently combined with thermoplastic binders into a uniform, high-performance structural panel. The invention addresses many of the processing challenges that have historically limited natural-fiber composites, including material distribution, fiber orientation, consolidation, and consistency. By controlling how the composite is formed during extrusion, the process produces boards with enhanced strength, dimensional stability, and durability while allowing for continuous, scalable manufacturing suitable for commercial production.
Co-Extruded Hemp Composite Board Method Patent (CHB)
Status: Published (Patent Pending) | Published March 14, 2024 | Filed May 26, 2023
This patent protects the proprietary manufacturing process used to produce multi-layer composite boards through a continuous co-extrusion system. The invention enables multiple material formulations to be extruded and fused into a single integrated panel, allowing each layer to be engineered for a specific function while maintaining structural integrity throughout the board. By enabling the efficient production of customized, application-specific products from a common manufacturing platform, the process provides manufacturers with the flexibility to optimize performance, cost, and regional requirements while maintaining the efficiencies of large-scale continuous production.
rPET Structural Sheathing Platform
Click here to learn more about this technology on our [Recycled PET Sheathing page].
Recycled PET Structural Sheathing Panel (Provisional Application)
Status: Provisional Application Filed | Filed February 27, 2026
This provisional application covers a structural composite panel featuring a foamed thermoplastic core — including recycled PET — bonded to fiber-reinforced polymer skins on each face. The panel is designed to replace wood-based structural sheathing and separately installed weather-resistive barriers in framed wall, roof, and floor assemblies, combining structural load transfer, fastener compatibility, integrated weather resistance, and vapor management in a single unitary panel.
The technology supports a range of configurable performance attributes, including flame resistance, thermal performance, and moisture and mold resistance, with material composition adaptable to specific applications such as wall sheathing, roof underlayment, subflooring, and tile backer board. The platform is built around recycled and renewable material content, offering a lighter-weight, more sustainable alternative to conventional OSB sheathing.