A more thorough explanation:

Constructive abandonment is a legal term that can have different meanings depending on the context. In family law, it refers to a situation where one spouse's behavior makes it impossible for the other spouse to continue living together as a married couple. This is also known as constructive desertion.

For example, if one spouse refuses to have any physical or emotional contact with the other spouse for an extended period of time, this could be considered constructive abandonment. The abandoned spouse may be able to file for divorce on the grounds of constructive abandonment.

In intellectual property law, abandonment refers to the voluntary relinquishment of a trademark or patent. However, constructive abandonment can occur when the owner of a trademark or patent fails to use or enforce their rights for an extended period of time, leading others to believe that the owner has abandoned their rights.

For example, if a company owns a trademark but fails to use it for several years, and another company begins using a similar trademark without objection from the original owner, the original owner may be deemed to have constructively abandoned their trademark rights.