T 0090/07 (Synthesis of arrays/HOUSTON UNIV.) 04-11-2009

Reasons for the Decision

1. Admissibility of Opponent I's appeal

1.1 On 30 April 2004 the European patent attorneys Weickmann & Weickmann filed an opposition against the patent-in-suit on behalf of febit AG. In the letter of opposition it was announced that the Power of Attorney would follow.

1.2 On 01 July 2004 insolvency proceedings of febit AG were opened, attorney at law Mr. Seagon became insolvency administrator.

1.3 The Power of Attorney including appeal proceedings before the EPO dated 21 December 2004, was signed by Mr. Seagon and carried the stamp "Christopher Seagon Rechtsanwalt als Insolvenzverwalter" (Christopher Seagon Attorney at law [acting] as insolvency administrator).

1.4 On 02 August 2006 a request was made to transfer the status as an opponent from febit AG to febit biotech GmbH. Since EPO did not consider this request to be sufficiently substantiated, the request was withdrawn by Opponent I's representative during oral proceedings before the Opposition Division.

1.5 In its decision the Opposition Division stated: "Given the request for transfer of the opponent status was withdrawn, there is no doubt as to the identity of the parties in the proceedings and the opposition division is in a position to take a decision.".

1.6 On 15 January 2007 an appeal was filed against the decision of the Opposition Division "in the name and on behalf of febit AG".

1.7 The Board agrees with the Patent Proprietors that, according to German law, a company terminates to exist as soon as insolvency proceedings have started (§262(1) lit.3 Aktiengesetz). In these cases the insolvency administrator would have to act under his own name and not in the name of the insolvency debtor.

1.8 However, on the basis of the documents on file there is no doubt that Mr. Seagon acted as insolvency administrator to represent the interests of the insolvent febit AG (see J 0025/86 OJ EPO 1987, 475). Therefore, neither in opposition nor in appeal proceedings there was any doubt as to the identity of Opponent I.

1.9 Thus the appeal of Opponent I is admissible.

2. Introduction of the documents filed with letter of 02 October 2009 into the procedure

2.1 With letter of 02 October 2009, i.e. one month prior to the oral proceedings before the Board, the Opponent I submitted new documents allegedly destroying novelty of the sets of claims submitted with the grounds of appeal and submitted with the request to dismiss the appeal of Opponent I (labelled as "main request" and "first auxiliary request"). The Opponent I argued that these documents had to be taken into consideration due to their prima facie relevance.

2.2 The Patent Proprietors argued not to take these documents into consideration given their late submission.

2.3 The Board cannot see any reason why the Opponent I did not present the documents in due time. In the present case the appeal was filed by Opponent I on 15 January 2007 and the documents were only filed with letter of 02 October 2009, i.e. more than two and a half years later.

2.4 To have waited with the filing of new documents until about one month prior to the oral proceedings jeopardizes the whole object of such proceedings, which was to prepare a case for decision at the conclusion of the oral proceedings and denies to the Patent Proprietors sufficient time for filing a detailed counterstatement.

2.5 In particular no reason was given by the Opponent I for the late submission.

2.6 Thus, the Board decides not to introduce these documents into the procedure (see Article 13(1) and (3) RPBA, Supplement to OJ EPO 1/2009, page 41).

3. Set of claims submitted with the grounds of appeal (labelled as "main request") - Novelty

3.1 D1 describes a device for the detection of molecular structures; probes used for this detection may be synthesized in test sites on a chip. In column 13, lines 28-40 and Figure 17 a specific embodiment is described: the reactor comprises an array (400) of test sites (412) and an optical system represented by a laser (416). Figure 17 shows that the individual reaction sites are spatially separated. The passage in column 13 discloses, that a switchable mirror array may be used which acts as a light valve on selected sites, the pixel elements can be electronically switched "on" and "off". This embodiment is used as alternative to that of figures 1 to 4 for synthesizing DNA probes (column 11, line 66 to column 12, line 20 in combination with column 13, lines 28-29).

3.2 The Board has no doubt that, as found in the decision under appeal, point 4.3 of the reasons, the skilled person would have understood the switchable mirror array of D1 to be a digital micromirror device:

The switchable mirror array described in D1 is to be used as an alternative to a laser beam (column 13, lines 28/29). This laser beam is described as selectively irradiating individual test sites (column 12, lines 13/14), having dimensions of 100 x 100 µm each (Figure 3). Thus, the device according to D1, comprising mirrors capable of selectively irradiating such small areas must be a micromirror device. In addition, it has never been disputed by any of the parties, that the micromirror array according to D1 is a digital device. In fact, the Opponent I explained at the oral proceedings that the terms "switchable mirror array" and "digital micromirror device" are synonyms.

3.3 With respect to the passage in column 13 of D1 and Figure 17, the Patent Proprietors' arguments that D1 does not directly and unambiguously disclose the device according to Claim 1 of the patent-in-suit, cannot be accepted by the Board:

3.4 On the one hand Figure 17 shows unambiguously that the reaction sites are (spatially) isolated. Claim 1 of the set of claims submitted with the grounds of appeal (labelled as "main request") requires merely that "the reaction sites are isolated reaction sites". In the Board's view, by spatially separating, i.e. isolating the reaction sites, this criterion has been met.

3.5 On the other hand a computer (421) controlled spatial optical modulator comprising a switchable mirror array comprising a plurality of individual rocking mirrors for selectively irradiating isolated reaction sites is described in D1, see figure 17 and column 13, lines 32 to 40. Therefore, all the features of Claim 1 have been disclosed directly and unambiguously in combination in D1.

3.6 Hence, the set of claims submitted with the grounds of appeal (labelled as "main request") does not meet the requirement of Article 54 EPC.

4. Set of claims submitted with the request to dismiss the appeal of Opponent I (labelled as "first auxiliary request") and set of claims labelled as "second auxiliary request" - Article 123(2) EPC

4.1 Each Claim 1 of the set of claims labelled as "first" and "second" auxiliary request contains the feature "characterized in that an isolation means prevents diffusion of reagents between adjacent reaction sites and spatially isolates individual reaction sites".

4.2 Page 5 of the application as originally filed teaches that the array of sites contains a plurality of isolated reaction sites, but does not cite any means for preventing diffusion.

4.3 The passages on page 19, lines 21-24 and on page 21, lines 3-4 and 9-10 as originally filed refer to methods of preventing H**(+) and activator diffusion and refer to a method of preventing activator diffusion between adjacent sites to be described later in the text. Since such methods have only been described on pages 34 to 36 in connection with the Figures 9A-9C, the passages cited above do not give a general teaching about diffusion prevention.

4.4 The passages on pages 34-36 as originally filed describe only the concrete embodiments of the figures 9A-9C for preventing such diffusion.

4.5 The reaction schemes on page 12 of the application as originally filed give an overview of the chemical reactions occurring in situ by irradiation. However, diffusion prevention has not been described on this page.

4.6 Thus, the teaching of the application as originally filed either discloses that the reaction sites are isolated - which is not synonymous for diffusion prevention, or describes specific embodiments for achieving this effect. The generalisation of Claim 1 has not been originally disclosed.

4.7 The set of claims submitted with the request to dismiss the appeal of Opponent I (labelled as "first auxiliary request") and the set of claims labelled as "second auxiliary request" thus do not meet the requirement of Article 123(2) EPC.

5. Set of claims submitted with the letter dated 01 October 2007 (labelled as "third auxiliary request") - Article 123(2) EPC

5.1 The set of claims labelled as "third auxiliary request" differs from the set of claims submitted with the request to dismiss the appeal of Opponent I (labelled as "first auxiliary request") in the passage "characterized in that an isolation means selected from the group consisting of microwell structures on a back cover (903), microwell structures on a substrate (913), and a pattern of non-wetting film on a substrate (933) prevents diffusion of reagents between adjacent reaction sites and spatially isolates individual reaction sites".

5.2 As confirmed by the Patent Proprietors in the oral proceedings, the three isolation means described in Claim 1 should represent the embodiments of Figures 9A-9C of the patent-in-suit.

5.3 The wording of the inserted text of Claim 1 can be found on page 10, last line to page 11, third line of the description as originally filed. However, these lines are only a general reference to Figures 9A-9C and do not contain all the features of these embodiments. A more detailed description can be derived from the figures themselves and from the text on pages 34-36 describing these figures.

5.4 The Board finds that the wording of Claim 1 is for instance more general than the closing mechanism described in embodiment 9A, according to which the reactionwells, bounded by barriers (903), are embossed on the cap (902) (page 34, lines 15 to 16) and the barriers are arranged in such a way as to create a space between adjacent buffer cells (passage bridging pages 34 and 35).

Embodiment 9B refers in the description to a similar closing mechanism, which is described to seal the individual reactionwells.

5.5 The insertion of the brief description of the figures according to pages 10/11 thus is not sufficient to describe the entire embodiments represented in the figures.

5.6 Even assuming that the features relating to such a closing/seal mechanism are not closely linked to the other features of the embodiments represented in the figures and that consequently the closing mechanism may be claimed separately, the description does not contain any support for general embodiments as reported in the claims.

5.7 Also the use of reference signs does not change this situation, since their role is merely to make the wording of the claims more understandable, but they are not to be seen as limiting.

5.8 Since the features in question are not reflected by the wording of Claim 1, this claim extends beyond the disclosure as originally filed; the requirement of Article 123(2) EPC is not considered to be met.

6. Sets of claims labelled as "fourth" and "fifth" auxiliary request - Article 123(2) EPC

6.1 The feature corresponding to embodiment 9A of the description is characterized in each Claim 1 of the sets of claims labelled as "fourth" and "fifth" auxiliary request as reactionwell structures on a cap and a seal mechanism to push the cap against the substrate. Embodiment 9B is described as reactionwell structures on a substrate, a cap having a flat inner surface and a seal mechanism to push the cap against the substrate.

6.2 As mentioned above, lines 15/16 on page 34 as originally filed disclose "reactionwells, bounded by barriers, are embossed on the cap. Furthermore the first two lines on page 35 state that "the space between adjacent reaction-wells 904b and 904c provides a buffer zone 904d to further prevent any inter-mixing between reaction-wells. Embodiment 9B comprises also reaction well barriers and a seal mechanism similar to the one of embodiment 9A.

6.3 Again, since some of the features of the embodiments 9A and 9B reported in said passages are missing in Claim 1, the closing/sealing mechanism is defined in more general terms than in the application as originally filed.

6.4 Therefore the requirements of Article 123(2) EPC are not met for the same reasons as mentioned hereinabove.

7. Further objections raised by Opponent I

7.1 Since none of the requests meets the requirements of the EPC, a discussion of further objections raised by the Opponent I is not necessary.