International Patents

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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, […]

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    Aluminum Remelting and Casthouse Strategies

    The aluminum casthouse is where aluminum wrought processing and shape casting begins, and there are many casthouse functions to consider. Scrap sorting, decoating of organic coatings on scrap, remelting, alloying, melt purification by refining and degassing, grain refining, melt transfer to casting station, casting by direct chill or other means, ingot heat treatment, and dross […]

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    Welding of Aluminum Alloys

    Experienced welders will tell you that, compared to welding steel, welding aluminum and its alloys is not difficult but different. Steel, being one of the common construction materials, most welders and myself included started by learning how to weld steel. As aluminum has especially gained market share in transportation, welding aluminum is challenged in various […]

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    International Patents: Metallurgy of Aluminum Alloy Heat Treatment

    The quest for higher strength materials, especially in transportation markets, seems to be never ending. The aluminum industry is meeting the demand with new alloys and heat treatments aimed at optimizing properties made of age hardening aluminum. Processing age hardening aluminum alloys to meet high strength levels in various product forms requires special heat treatment, […]

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    Aluminum Casthouse Technology

     Editor’s Note: Various aspects of aluminum casthouse technology appear in almost every issue of Light Metal Age, no doubt because it is the first step and an important link in the wrought aluminum processing chain required for subsequent downstream processing and production of quality product. With no exception, the international patent survey presented here focuses […]

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    Primary Aluminum: Inert Anode and Wettable Cathode Technology in Aluminum Electrolysis

    Editor’s Note: Unlike aluminum’s sustainable advantage in recycling, primary aluminum production (which uses carbon anodes in the Hall-Héroult process), continues to be energy intensive and a greenhouse gas (GHG) producer. Ignoring the effect of CO2 generation in the coal/hydrocarbon power equation, the use of carbonaceous anodes in the smelting process generates GHGs as carbon is […]

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    Aluminum Extrusions: Process to Product

    US10486821 — JET ENGINE ANTI-ICING AND NOISE-ATTENUATING AIR INLETS — The Boeing Company (USA) — An embodiment of a jet engine air inlet providing anti-icing, and optionally, engine noise reduction, includes a rigid frame defining a gridwork of contiguous cells. A cap skin has an outer surface sealingly attached to an inner surface of the […]