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  • Patents are generally in force for 20 years from the date of application and "software patent" is not a separate category with special treatment regarding length of term.
    – George White
    Mar 30 '20 at 17:44
  • If you know the particular patents by their number, we can check their status. Otherwise it makes it a lot of work to track them down.
    – Eric S
    Mar 30 '20 at 19:18
  • Perhaps this is relevant: en.wikipedia.org/wiki/VC-1
    – Eric S
    Mar 30 '20 at 21:05
  • «"software patent" is not a separate category with special treatment regarding length of term.» Thanks, I just mentioned and check that i case there was a different duration for that.
    – tuxayo
    Apr 1 '20 at 12:42
  • @EricShain «If you know the particular patents by their number» Does it happen to have software patents enter in application after (a year or more) the publication of software using them? The hope is that it's possible to have a first step with a reasonable certainly of legal safety of the format based only on the format introduction date. Only for small projects. My actual goal needs more legal safety. Thanks for your guidance, I'll try to explore (and maybe ask on this forum) to get the list the patents.
    – tuxayo
    Apr 1 '20 at 15:40

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