Superprotonic Raising Round II

Superprotonic Inc., a Pasadena, Calif.-based developer of solid-acid fuel cells, has held a first close on its $16.2 million second-round of funding. US Venture Partners led the deal, and was joined by Dow Chemical Ventures and return backers CMEA Ventures, Nth Power Technologies, Hydro Technology Ventures, Battelle Ventures, Innovation Valley Partners and OnPoint Technologies. www.superprotonic.com