Plug Power has been granted a patent for a cryogenic dewar that includes an inner tank and an outer tank. The dewar is designed to meet governmental regulations on strength and safety without increasing weight or reducing the amount of cryogenic liquid that can be transported. The dewar includes longitudinal stiffeners to provide resistance to stress and increase the grade of the material of the inner tank. The stiffeners are positioned to avoid conductive heat transfer to the outer vessel. GlobalData’s report on Plug Power gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Plug Power, Reformer integrated fuel cells was a key innovation area identified from patents. Plug Power's grant share as of September 2023 was 56%. Grant share is based on the ratio of number of grants to total number of patents.
Cryogenic dewar with longitudinal stiffeners for transporting cryogenic liquids
A recently granted patent (Publication Number: US11713848B2) describes an apparatus for transporting cryogenic liquids across roadways. The apparatus includes a cryogenic dewar, which consists of an inner vessel and an outer vessel. The inner vessel is equipped with a plurality of rows of longitudinal stiffeners attached to its outside surface. These stiffeners are designed to resist different stresses along the longitudinal dimension of the inner vessel.
One important feature of the apparatus is that the rows of longitudinal stiffeners are located in a space between the inner and outer vessels, avoiding direct and indirect contact with the inside surface of the outer vessel. This design helps to prevent conductive heat transfer to the outer vessel.
The patent also provides specific details about the materials and configurations used in different variations of the apparatus. For example, the inner vessel can be made of aluminum or steel, with different nominal thicknesses. The cryogenic dewar can be configured for use as part of a truck trailer and designed to transport specific volumes of cryogenic liquids, such as liquid nitrogen, liquid argon, or liquid oxygen. The longitudinal stiffeners attached to the top portion of the inner vessel can be made of aluminum or stainless steel, depending on the specific application.
The patent also mentions the use of welding-compatible materials for the longitudinal stiffeners and provides information about the maximum allowable tensile stress and safety factors for the cryogenic dewar made of stainless steel or aluminum. Additionally, the inner vessel is designed to have a cavity for receiving cryogenic liquid, which is isolated from the space between the inner and outer vessels.
Overall, this patent describes an apparatus with improved structural features for transporting cryogenic liquids, ensuring efficient and safe transportation across roadways. The specific configurations and materials used in different variations of the apparatus allow for customization based on the type and volume of cryogenic liquid being transported.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
