Appeal No. 2001-2079 2
Application No. 09/308,400
application.1
THE INVENTION
The invention is directed to a water-based drilling fluid comprising a fatty alcohol
based additive. The drilling fluid is free from both a vegetable oil and an emulsifier.
Additional limitations are described in the following illustrative claim.
THE CLAIM
Claim 13 is illustrative of appellants’ invention and is reproduced below.
13. A water-based drilling fluid comprising:
a) 0.5 to 5 percent by weight of a fatty alcohol-based
additive comprising linear or branched monohydric fatty alcohol having at
least 12 carbon atoms; and
b) water and wherein the water-based drilling fluid is free of both a vegetable oil
and an emulsifier.
THE REJECTION
Claims 13 through 35 stand rejected under 35 U. S. C. § 112, first paragraph, as
containing subject matter which was not described in the specification in such a way as to
reasonably convey to one skilled in the relevant art that the inventors, at the time the
application was filed, had possession of the claimed invention.
1An amendment after final filed September 25, 2000 was denied entry.
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