Earlier quoted context omitted.
It might have, but it is very likely it would have been published in an academic paper anyhow (like it actually has). And in any case, no one actually reads software patents (lawyers tell you not to!), so even if it was patented but not published or otherwise documented, no one would have known about it. While the PageRank patent is definitely not a trivial patent - unlike the vast majority of software patents - it s…
>> "it still isn't an example of a patent used for good" What do you mean by good, then? It has generated lots of cash for Google and thus provided lots of jobs.
Unless you believe that it was Google patent on page rank algorithm that prevented all other companies to get better at doing search.