Markush group.Patents. A limited form of generic claim that recites an element, states that the element is a member of a group, and names the other group members, any of which could substitute for the first recited element. • All Markush group members must have at least one common property that is mainly responsible for their function in the claimed relationship.
Although each material in the group is different, each must be able to serve the same function. See MARKUSH DOCTRINE. [Cases: Patents 101(7).]
[Blacks Law 8th]