MADISON, Wis. — Gay rights advocates scored a major win Friday when an appeals court ruled Wisconsin’s domestic partnership registry was constitutional, but the victory could be short-lived as conservatives pledged to take the case to the Republican-leaning state Supreme Court.
Conservatives had argued the registry bestows a status similar to marriage on same-sex couples and violates a 2006 state constitutional amendment prohibiting gay marriage or anything similar to it.
The 4th District Court of Appeals disagreed. The court noted that legislators who supported the ban repeatedly said it wouldn’t prevent same-sex couples from receiving some benefits and went on to list a range of rights married couples enjoy that same-sex couples still don’t, including joint property ownership, joint adoption, and the ability to share health benefits even after a divorce.
Fair Wisconsin, the state’s largest gay rights group, defended the registry in court. Its executive director hailed Friday’s decision.
‘‘It demonstrates that Wisconsin really is about trying to treat people fairly,’’ Katie Belanger said.
Democratic lawmakers created the registry in 2009. About 1,800 couples were on the registry at the end of 2011, according to the latest official data.
Members of the conservative group Wisconsin Family Action filed a lawsuit in 2010, contending that the registry created a legal status substantially similar to marriage for same-sex couples and therefore violated the constitutional ban on gay marriage. The case is the first of its kind in the country, Belanger said; no other states have banned gay marriage and anything similar, while establishing a domestic partner registry.