Is possible to vote to move a SO question to Patents? (or to any other SE site, not listed among 5 off-topic alternatives)
You can flag for moderation attention, and ask for a question to be migrated.
Bear in mind that old questions are not probably migrated; in the same way, questions that are not good are not migrated (e.g. subjective questions).
For Ask Patents, remember the topic is:
- Solicit help finding prior art that might apply to a patent or application
- Get answers to hard questions about specific patents
- Ask questions about the US patent system or process