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Continued: Biofuel maker Gevo wins round in patent war

  • Article by: DAVID SHAFFER , Star Tribune
  • Last update: March 21, 2013 - 8:57 PM

Mike Ritzenthaler, a chemical engineer who works as an analyst for Piper Jaffray & Co., has long advised clients that Gevo had a leg up in the patent fight. He said the judge’s ruling also strengthens Gevo’s hold over technology to prevent bioengineered yeast from making ethanol.

“It is clear from the ruling that Butamax does not hold the keys to the technology to shut off the ethanol production, which is absolutely critical to producing isobutanol efficiently,” he said.

Ritzenthaler said Gevo has figured out that it must sterilize the corn mash so that only the bioengineered yeasts go to work fermenting isobutanol.

“It is a matter of getting the right systems in place,” he said.


David Shaffer • 612-673-7090 • Twitter: @ShafferStrib


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  • Gevo modified its Luverne, Minn., ethanol plant to convert it to isobutanol production.

  • Patrick Gruber, chief executive officer of Gevo Inc.

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