There is a patent whose legal status in 2008 is the effectiveness of substantive examination. In 2009, after the publication of the invention patent application, the legal status was deemed to have been withdrawn. Is the patent still valid?
It can't be called a patent at all. This is just a patent application. The legal status is that an application for a patent for invention is deemed to have been withdrawn after its publication. Most of the reasons are that after the examiner issued the examination opinions, the applicant did not reply (it is estimated that there is no authorization prospect).
This patent application is generally over.