International Patents

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    Forging of Aluminum Alloys

    Editor’s Note: As a manufacturing process where metal is hot or cold pressed under great pressures in the solid state to produce three dimensional parts, forging has long been associated with high quality wrought aluminum products. The recent patents below cover aluminum forgings used throughout the transportation industry, from aerospace to automotive to bicycles, as […]

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    Latest Friction Stir Welding of Aluminum

    Editor’s Note: As many Light Metal Age articles and items have noted, the friction stir welding (FSW) process, which joins aluminum components in the solid state, has been applied throughout the world in various industries that produce products for transportation, B&C, and industrial and consumer sectors. The November 2020 selection of patents covered a wide […]

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    Productive and Sustainable Alumina Production

    Editor’s Note: On August 3rd, 1888, Austrian chemist Karl Josef Bayer working in Saint Petersburg, Russia was granted German patent 43977 for his invention involving a process for the production of aluminum hydroxide. At the time, his invention was used by the textile industry that made use of aluminum hydroxide as a dye fixative. Other […]

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    Magnesium Alloy Process Developments and Applications

    Editor’s Note: Although the focused patent surveys in Light Metal Age have generally covered select aluminum technologies, magnesium alloy technology has generally been sidelined. Nevertheless, magnesium is a major alloying master alloy in aluminum casthouse production and critical to the reduction of light metals, such as titanium and beryllium. Therefore, this patent survey aims to […]

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    Resistance Spot Welding of Automotive Aluminum Alloy Sheet

    Resistance spot welding (RSW), a technology that’s at least 100 years old, has been used by the automotive industry almost exclusively for joining steel sheet without using filler material or flux. The process utilizes shaped copper alloy electrodes, typically water cooled, to apply heat and pressure to pass electric current through stacked up sheets to […]

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    Friction Stir Welding of Aluminum Alloys

    Editor’s Note: As many articles have appeared in Light Metal Age (both in the magazine and online) describing and following the friction stir welding (FSW) process, especially its application in joining aluminum alloys in various forms and tempers, readers should be familiar with its advantages. In the FSW process, aluminum components are joined in the solid […]

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    Aluminum Alloy Composition and Method

    Editor’s Note: Although the Aluminum Association has certified hundreds of international aluminum alloys in each of the wrought and cast categories, aluminum metallurgists keep adding new recipes to meet the challenges required in their products, which span a range of applications—transportation, B&C, packaging, and various industrial and consumer products. The focused patent search presented hereafter reviews […]

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    Special Applications of Aluminum Anodized Surfaces

    Complimenting our September 2019 International Patent Calendar (which focused mostly on methods of anodizing aluminum), this month’s collection of patents focuses on special applications of anodized aluminum surfaces. The uniqueness of anodized aluminum oxide coatings in terms of their chemical, physical, and mechanical properties has resulted in many innovations in various industrial and scientific fields, […]