Wind Harvest files international patent for reinforced VAWT blade

By AI, Created 9:41 AM UTC, May 20, 2026, /AGP/ – Wind Harvest International filed a Patent Cooperation Treaty application on May 6, 2026 to protect a reinforced blade design for vertical axis wind turbines in more than 150 countries. The move extends the Davis, California company’s patent strategy while it seeks broader commercial protection for utility-scale VAWT technology.

Why it matters: - The filing gives Wind Harvest a longer runway to secure patent protection in major wind markets outside the U.S. - The reinforced blade is described as the structural breakthrough that makes utility-scale vertical axis wind turbines commercially viable. - Wind Harvest says the PCT route can preserve rights across 150+ countries while the company decides where to enter national patent phases.

What happened: - Wind Harvest International filed international patent application PCT/US26/26856 on May 6, 2026. - The application covers a Reinforced Blade for a Vertical Axis Wind Turbine. - The United States Patent and Trademark Office acted as the Receiving Office. - The filing claims priority to U.S. Patent No. 12,595,781 B1, which was granted April 6, 2026. - Wind Harvest said the filing advances its global commercialization strategy for utility-scale VAWT technology.

The details: - The PCT process gives Wind Harvest until December 17, 2027 to choose specific countries and regional patent bodies for national-stage protection. - Target markets under consideration include the European Union through the European Patent Office, China, Australia, Latin America and nine countries in Africa. - Patents granted in each country would remain in force through about 2046. - The PCT system will generate an International Search Report and Written Opinion that provide a preliminary assessment of novelty and inventive step. - Wind Harvest says the patent addresses a long-standing engineering problem that limited VAWT scaling to industrial size. - The company says 15 million annual rotations with the loads of a larger blade caused structural failure at the blade attachment point. - The patent covers a reinforcement architecture that allows large VAWT blades to be made. - The design is meant to eliminate the need for epoxying on a plate between the hinge mechanism and the blade. - Wind Harvest says manufacturers using aluminum extrusion or composite pultrusion will need to account for the patent claims. - The company says the interior wall spacing and geometry protected by the patent are structurally necessary at large blade scale. - Patent counsel Jeremy A. Briggs of Briggs IP authorized the filing, and Stephen Malik processed it. - Wind Harvest says the new PCT filing complements eight other granted U.S. patents covering its polygonal mast, hinge-mast and hinge blade connections, structural bracing and collapsible rotor systems. - An independent freedom-to-operate analysis done for investor due diligence confirmed the company’s core commercial technology operates freely within the current patent landscape.

Between the lines: - The company is using the PCT system to delay final country-by-country decisions while keeping its options open in multiple regions. - The claim of broad competitive reach suggests Wind Harvest wants to strengthen leverage over rivals that may try to build large-format VAWT blades using similar manufacturing methods. - The filing also signals that Wind Harvest is trying to translate a technical design feature into a long-term defensible commercial position.

What’s next: - Wind Harvest will use the PCT window to decide where to pursue full national-stage filings before the December 17, 2027 deadline. - The company expects country-specific patent rights to run for roughly another 20 years once granted, through about 2046. - Any future protection will depend on outcomes in national and regional patent examinations.