this post was submitted on 22 Jan 2024
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[–] dhork@lemmy.world 1 points 10 months ago* (last edited 10 months ago)

I dunno what US patent law states but I would have thought it's back dated to when it was applied.

The US didn't do things that way until Nov 2000. Patents filed for before then were given a term based on their publication date. So sometimes applicants deliberately tied up their applications with filings and amendments to delay their publication date and give them a bit more time when the patent ca be enforced.

https://en.m.wikipedia.org/wiki/Submarine_patent