No zinc. It says, "This process requires no reduction step and yields are unexpectedly high.", and everything I've read tells me that no cluster-fuck occurred in the writing of it.
The patent mentions that other methods that use ozonolysis only give yields of less than 75%, and all of them reqire a reduction. -> That info's on page 1, at the end of paragraph 3. You can find the patent at http://gb.espacenet.com/ (http://gb.espacenet.com/)
Good yields and no reduction; not bad for a patent from 1959! 8)
The christian god hates your soul. Care for a little necrophilia?