{"id":5097,"date":"2025-12-30T09:00:00","date_gmt":"2025-12-30T15:00:00","guid":{"rendered":"https:\/\/patents.harnessip.com\/?p=5097"},"modified":"2025-12-30T14:21:45","modified_gmt":"2025-12-30T20:21:45","slug":"december-30-2025","status":"publish","type":"post","link":"https:\/\/patents.harnessip.com\/?p=5097","title":{"rendered":"December 30, 2025"},"content":{"rendered":"\n

On December 30, 1913, Dr William David Coolidge received U.S. Patent No. 1,082,933 on a method for making ductile tungsten for the purpose of making filaments for electric lamps — a task he was assigned when he joined the General Electric Research Laboratory in 1905.<\/p>\n\n\n

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Coolidge developed a way to superheat the metal tungsten in order to draw it out into the fine threads used for lamp filaments. Coolidge then improved the X-ray tube by using a heated tungsten filament cathode in vacuum producing electrons, instead of residual gas molecules in the tube. (U.S. Patent No. 1,215,116). This permitted higher operating voltages, higher energy X rays, and the treatment of deeper-seated tumors.<\/p>\n\n\n\n

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On December 30, 1913, Dr William David Coolidge received U.S. Patent No. 1,082,933 on a method for making ductile tungsten for the purpose of making filaments for electric lamps — a task he was assigned when he joined the General … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-5097","post","type-post","status-publish","format-standard","hentry","category-patent-of-the-day"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/5097","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5097"}],"version-history":[{"count":2,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/5097\/revisions"}],"predecessor-version":[{"id":5106,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/5097\/revisions\/5106"}],"wp:attachment":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5097"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5097"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}