Fuel-cell developer closes in Broomfield

BROOMFIELD- Massachusetts-based Protonex Technology Corp. is closing its Colorado solid oxide fuel-cell division, Protonex Technology LLC, formerly Mesoscopic Devices.

In April, Protonex said it would not proceed with the introduction of its planned methanol-fueled fuel cell for recreational vehicles, focusing development efforts instead on the propane- and diesel-fueled systems under development in Colorado.

But now, Protonex plans to consolidate its operations at its Southborough, Mass., headquarters by the end of August. Less than a quarter of the 25-person staff will relocate.

The company plans to cancel its admission to the alternative investment market of the London Stock Exchange, going private June…