Appeal No. 95-4089
Application 08/090,073
a. 5 to 10 parts by weight of maleic acid;
b. 20 to 45 parts by weight of phosphoric
acid;
c. 10 to 25 parts of urea; and
d. 1 to 10 parts of a nonionic surfactant.
33. Bechstedt does not tell us the pH of his
cleaning composition. But the amounts of base (urea) and acid
(maleic acid and phosphoric acid) described as being present
in the composition are such that it would appear that there is
more acid than base.
34. For example, we calculate that in Example 1
there are 0.43 moles of maleic acid (50/116); 1.43 moles of
phosphoric acid ((165 x 0.85)/98); and 0.86 moles of urea
(62.5/72). Hence, it is entirely plausible that the
composition of Bechstedt has a low pH in the range of 1-4.7
Cook
35. The most relevant reference we have discovered
is a reference cited by an examiner who conducted a PCT search
Should there be further prosecution of the application, applicant can (1) make7
the compositions described in each of Examples 1 through 8 of Bechstedt, (2) measure the
pH and (3) report the results to the examiner in a declaration under 37 CFR § 1.132.
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