PCR patent debate - part 73

[john brennand]

I seem to recall that when Mullis was patenting PCR in the late 80's 
there was a lot of scepticism around here that this would be granted on 
the grounds that it was "obvious" by virtue of a description of the 
principle of the technique in a paper by Gobind Khorana (I think!) 
published in the late 70's.

Can anyone recall that paper - I would be interested in looking up the 
details.

Thanks, John