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Mastercard may be looking to integrate blockchain into its payments infrastructure. The U.S. Patent and Trademark Office (USPTO) published a new application from the financial giant this week that outlines a solution for a "uniform settlement system" – one that would help ease some of the friction involved with business-to-business payments. Specific issues cited in the application include growing data storage demands and the overall volume of transactions. Notably, Mastercard suggests in the text that such a system could include a blockchain-based ledger of transactions. As the application explains: "In some embodiments, the ledger may be a blockchain configured to store the associated data. ... In the system, the data values may include the purchase orders, invoices, transaction data, and other data stored in the ledger as discussed herein." Mastercard clarified that the blockchain would be able to automatically note all changes made to the