{
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  "slug": "interference-proceeding",
  "title": "Interference proceeding",
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  "lead": "In United States patent law, an interference proceeding, also known as a priority contest, is an inter partes proceeding to determine the priority issues of multiple patent applications. Unlike in most other countries, which have long had a first-to-file system, until the enactment of the Leahy–Smith America Invents Act (AIA) in 2011, the United States operated under a first-to-invent. The interference proceeding determines which of several patent applications had been made by the first inventor. The AIA switched the US to a first-to-file regime effective March 16, 2013, and interferences apply only to patent applications with an effective filing date prior to that change.",
  "body": "In United States patent law, an interference proceeding, also known as a priority contest, is an inter partes proceeding to determine the priority issues of multiple patent applications. Unlike in most other countries, which have long had a first-to-file system, until the enactment of the Leahy–Smith America Invents Act (AIA) in 2011, the United States operated under a first-to-invent. The interference proceeding determines which of several patent applications had been made by the first inventor. The AIA switched the US to a first-to-file regime effective March 16, 2013, and interferences apply only to patent applications with an effective filing date prior to that change. ==References==",
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    "title": "Interference proceeding",
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    "publisher": "Anticloud FZ LLE",
    "publisher-place": "Dubai, United Arab Emirates",
    "URL": "https://encyclopegia.org/a/interference-proceeding",
    "issued": {
      "date-parts": [
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          2026,
          11,
          12
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