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Date Filed
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Data Type:
Date
Date Filed is the filing date for a patent application, as assigned by the issuing patent office. The Date Filed can be found on the line of a patent document labeled 'Filed.'
subject Entity Type Constraints
Patent
Citation Requirement
Recommended - A citation is recommended for triples with this predicate.
Example of Proper Usage:
'
US Patent D0974555 Endoscope operating unit
' → 'Date Filed' → 'September 13, 2019' is correct, citation:
https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/D974555
.
Example of Improper Usage:
'
US Patent D0974555 Endoscope operating unit
' → 'Date Filed' → 'January 3, 2023' is incorrect because it is the Date of Patent. Date Filed will be listed in the patent document following the Patent Application Number. Citation:
https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/D974555
.