I see Article One Partners has a research study for US5491834. Why would anyone post prior art at Ask Patents for granted patents?
migrated from patents.stackexchange.com Mar 13 at 17:15
This site is not about pre-issuance searches. See the others questions on the topic. It is only concerned with invalidating issued patents. You have a legitimate point, why give away a free search? Probably explains the utter dearth of responses to calls for prior art. Most appear to be nothing than so someone using google patent's prior art feature.
The concept that the site makes the examination process better means it has to deal with pre-issuance inventions. That takes away from work though for people who want to get paid to file bad applications.