ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,489,730, issued on Dec. 2, was assigned to MICROSOFT TECHNOLOGY LICENSING LLC (Redmond, Wash.).

"Processing for spam detection of untrusted domains" was invented by Lu Tang (Issaquah, Wash.) and Shi Pu (Redmond, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of the technology described programmatically decrease the number of spam Uniform Resource locators (URLs) that are accessed from untrusted domains when the subdomain prefix is above a threshold probability of having been randomly generated. In this regard, prior to adding a discovered set of URLs to a crawl queue of a web crawler, the URLs are filtered into URLs from trusted domains...