I think it really depends on what you mean by "technology", but if you mean PageRank, I assume it is really a math/algorithm description (I've never read the patent), so it would no longer be considered patentable.

That said, it seems like everyone uses some variant on PageRank as at least part of their search engine heuristics, so it might be that the patent is fairly narrow and/or they don't try to enforce it anyways.