Appeal No. 95-0448
Application 07/825,632
This is an appeal from the examiner's decision finally
rejecting claims 28 and 5, which are all of the claims still
pending in the application.
Claims 28 and 5 read as follows:
28. A method for producing xanthan gum comprising cul-
turing a Xanthomonas campestris strain having a modification
of exogenous genetic information capable of complementing an
XgsG mutation, wherein said exogenous genetic information
comprises exogenous DNA having a restriction map of a segment
selected from the group consisting of c1H5, c1, c9H7, c82, c9,
a fragment of c9H7 comprising c9e, a fragment of c82 compris-
ing c9e, a fragment of c9 comprising c9e, and c9e, and is
obtained from a Xanthomonas campestris strain.
5. The method of Claim 28, wherein said strain is capa-
ble of producing at least 1 gram of xanthan per liter of
culture medium per hour.
The single reference relied upon by the examiner is:
Rogovin et al. (Rogovin), “Production of Polysaccharide with
Xanthomonas campestris,” Journal of Biochemical and
Microbiological Technology and Engineering, Vol. III, No. 1,
pages 51-63 (1961).
Claims 28 and 5 stand rejected under 35 U.S.C. § 103 over
Rogovin. We reverse this rejection.
Background
Xanthan gum is an exopolysaccharide produced by bacteria,
particularly by strains of Xanthomonas campestris. Commer-
cially available strains of Xanthomonas campestris had been
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