T 0423/09 03-02-2011

1. The appeal is admissible.

2. Admissibility of D8 and D9

The Respondent no longer objects to the introduction of D9 into the proceedings, but requests that D8 be rejected as late filed.

D8 was submitted with the grounds of appeal, that is at the earliest possible moment in the appeal proceedings. This document is an article from the "Journal of Dairy Science" and thus illustrates the common general knowledge of the skilled person.

On page 736, left hand column, second paragraph, this citation discloses that the preservative tablet in the plastic sample bag is dissolved "by gentle shaking" that is by agitating "on closing the bag".

Thus this citation is obviously relevant and since its consideration would not delay the proceedings in any way, the Board in exercising its discretion in particular under Article 12 (4) of the Rules of Procedure of the Boards of Appeal (RPBA) has decided to admit this citation into the proceedings.

3. Main request and auxiliary request 1

3.1 D13 is undisputedly the closest prior art document and discloses the prior art portion of claims 1 and 21.

Auxiliary request 1 further specifies with respect to the main request that said milk sample is: "in said selected one of said milk sample collecting elements (9)". This further feature is also disclosed in D13.

3.2 The milk sampling apparatus of claim 1 according to the main and first auxiliary request differs from that of D13 in that it comprises agitating means capable of agitating said milk sample.

The milk sampling method of claim 21 according to the main and first auxiliary request differs from that of D13 by the step of agitating said milk sample.

3.3 As stated in the patent specification, paragraph [0007] and [0074] "… the sample tubes are typically prepared with a preservative prior to sampling …" or paragraph [0075] "The sample tubes are typically delivered to the farmer in a cleaned and preservative prepared condition…".

It is therefore implicit that a standard milk sample collecting element already contains a preservative before the milk sample is added.

3.4 Starting from D13 as closest prior art, the problem the invention seeks to solve may thus be seen in improving preservation of the milk quality of the milk samples, when using an automated milk sampling system of the kind disclosed in D13.

D3 is a document intended to serve as a field manual on preservation of milk samples which gives guidance as to the best practice for manual collection of samples. This document thus illustrates the common general knowledge of the skilled person in relation to milk sample preservation. D3 recommends inter alia the following practice (page 11, section 3.2):

i) the milk tubes into which the milk samples are to be delivered are provided with a chemical preservative and ii) after milking, the sample box should be turned over three or four times in order to mix the preservative and the milk well. Thus common general knowledge in relation to milk sample preservation does include the step of agitating the collected milk sample, so as to mix the milk sample with the preservative.

D9 (page 2, "Protect Sample Quality") states: "Make sure you mix the milk and preservative well by rotating the bottles as they are filled… Thorough mixing with the preservative is especially important in the summer months".

D8 (page 736, second paragraph of the left hand column, lines 1 to 3 and 5 and 6) specifies "Milk … was dispensed … into … plastic bags…" and "Thus, on closing the bags [sample collecting element] and dissolving the tablets [preservative] by gentle shaking …"

3.5 The fact that D3, D8 or D9 refer to manual collection of milk samples is irrelevant. These citations define the recommended practice for the preservation of milk quality of collected milk samples which includes agitating the sample collecting element so as to mix or dissolve the preservative in the collected milk sample.

3.6 The Respondent argued that the idea underlying the present invention is to improve the preservation of the milk quality of the collected milk samples by enabling strongly accelerated dissolution of the preservative in the milk samples and that this idea is not taught by the cited prior art.

However, D9 "National Dairy Herd Improvement Handbook" deals with practices to be followed with regard to milk sample preservation. On page 2 of the handbook "Protect sample quality" the recommended practice is as follows: "Make sure you mix the milk and preservative well by rotating the bottles as they are filled or by gently rotating the whole box after you complete milking". It goes without saying that the skilled person following this recommended practice would also consider agitating the milk sample collecting element as it is filled and would thus "strongly" accelerate the dissolution of the preservative in the milk sample.

Under established Board case law an enhanced effect cannot be adduced as evidence of inventive step if it emerges from obvious tests, see in particular T296/87 (OJ EPO 1990, 195, point 8.4.1). In the present case the enhanced effect, that is the strongly accelerated dissolution of the chemical preservative, does not emerge from routine tests but from the practice to be followed according to the rules and recommendations of the handbook D9. The skilled person following the recommended practice prescribed in this handbook, and thus acting only routinely would inevitably obtain this enhanced effect which therefore cannot be taken as an indication of inventive step.

3.7 The Respondent submitted that D3 does not provide a clear teaching since it also warns the reader against any rough handling of the milk samples such as shaking or stirring. However, this article addresses the skilled practitioner who knows that excessive agitation might be detrimental to the milk sample and that only a gentle agitation is required (as indicated in D8, page 736, second paragraph of the left hand column).

The Respondent submitted also that it would not have been obvious to equip the automated sampling apparatus of D13 with an agitating means. However, according to the routine described in particular in D3, the sample collecting box containing the sample collecting elements has to be agitated such as to thoroughly mix the preservative with the milk sample in the sample collecting elements. There would be no difficulty for the skilled person, here the specialist of automated sampling apparatuses who also knows the procedures to be followed with regard to milk sample preservation to provide these sampling apparatuses with automated agitating means.

3.8 Consequently, the subject-matter of claims 1 and 21 according to the main request or the first auxiliary request does not involve an inventive step.

4. Auxiliary requests 2 to 4

4.1 With respect to the independent claims of the first auxiliary request, the independent claims according to auxiliary request 2 are amended to add that the milk sample is agitated in a milk sample collecting element "to which a preservative has been added or which has been prepared with a preservative and said agitating means is effective to accelerate the dissolving of the preservative in the milk sample".

The problem to be solved by the independent claims according to auxiliary request 2 with respect to the closest prior art D13 remains the same, i.e. may still be seen in further improving the preservation of the milk quality of the milk samples.

As stated in the patent specification "the sample tubes are typically delivered to the farmer in a cleaned and preservative prepared condition" which means that adding a preservative or having the sample collecting element prepared with a preservative is the normal standard procedure which therefore cannot provide inventiveness to the claimed subject-matter.

The further added feature ("said agitating means is effective to…") only indicates the effect to be achieved by the agitating means which is to accelerate the dissolution of the preservative in the milk sample.

However, as has been explained the handbook D9 recommends "Make sure you mix the milk and preservative well by rotating the bottles as they are filled or by gently rotating the whole box after you complete milking". It goes without saying that the skilled person following this recommended practice would also consider agitating the milk sample collecting element as it is filled and would thus inevitably accelerate the dissolution of the preservative in the milk sample.

Thus the discovery, if any, of the claimed enhanced effect does not involve an inventive step.

For these reasons, the subject-matter of claims 1 and 21 of auxiliary request 2 does not involve an inventive step.

4.2 With respect to the independent claims of the first auxiliary request, claims 1 and 21 of the auxiliary request 3 add "in said selected one of said milk sample collecting elements (9) by movement of the collecting element (9) containing the milk sample".

However D3, D8 and D9 clearly teach to agitate the milk sample by movement of the sample collecting element containing the milk sample. In D9 the sample collecting bottles containing the milk sample and the preservative are "rotated" as they are filled.

For these reasons, the subject-matter of claims 1 and 21 of auxiliary request 3 does not involve an inventive step.

4.3 The independent claims 1 and 21 of auxiliary request 4 comprise in combination the features of the independent claims 1 and 21 as granted and the additional features of auxiliary requests 2 and 3.

As has been already stated, the additional features of the auxiliary requests 2 and 3 cannot make an inventive contribution to the claimed method and apparatus.

It is not apparent that the combination of these features would provide any unexpected advantage over and above the sum of their effects.

Accordingly the subject-matter of claims 1 and 21 of auxiliary request 4 does not involve an inventive step.

5. Auxiliary request 5

5.1 Claims 1 and 21 of this request are amended to add with respect to claims 1 and 21 as granted the following feature "whereby agitation is performed subsequent to each taking of a milk sample".

5.2 Although it is implicit that the sample collecting elements of D13 are prepared with a preservative as it is usually the case, there is no indication in this citation that agitation is performed subsequent to each taking of a milk sample.

The problem to be solved by the subject-matter of auxiliary request 5 with respect to the closest prior art D13 may still be seen in improving preservation of the milk quality of the milk samples when using an automated milk sampling system of the kind disclosed in D13.

The Respondent submitted that the apparatus defined in claim 1 and the method defined in claim 21 of auxiliary request 5 provides for improved quality of the collected milk samples enabling accelerated dissolution of the preservative, since agitation is performed subsequent to each taking of a milk sample.

However, D9 recommends the following "Make sure you mix the milk and preservative well by rotating the bottles as they are filled or by gently rotating the whole box after you complete milking".

This handbook thus proposes two alternatives agitating either after each taking of a milk sample or after all milk samples have been taken.

When using a milk sampling apparatus as disclosed in D13 comprising a cassette in which a plurality of milk sample collecting elements are placed and a filling member capable of bringing milk samples into the collecting elements, it is clear for the skilled person that a large period of time will elapse between the moment a sample is brought into the first collecting element and the moment a sample is brought into the last collecting element in the cassette.

D9 (page 2, "Protect Sample Quality") however gives the additional recommendation "Thorough mixing with the preservative is especially important in summer months".

Accordingly, waiting until all collecting elements of the cassette are filled with a milk sample is clearly not a preferred option so that the skilled person would be prompted to perform mixing as soon as possible, i.e. according to the first alternative disclosed in D9, subsequent to each taking of a milk sample.

Reference is also made to D8, which discloses on page 736, second paragraph that the preservative tablet in the plastic sample bag is dissolved by gentle shaking "on closing the bag" that is after a milk sample has been dispensed into the plastic sample bag.

Accordingly the subject-matter of claims 1 and 21 of auxiliary request 5 does not involve an inventive step.