T 0324/24 - Undisclosed disclaimer for accidental anticipation

Key points

•  Claim 1 of the main request includes a disclaimer: "except a solution of 60 U/100 myl transglutaminase in 50% glycerol, 1 mM glutathione, 150 mM NaCl"
• " Claim 1 concerns a liquid enzyme preparation that has a basis in claims 1 and 3 of the application as filed, further amended by the introduction of the disclaimer  "
• "The opposition division considered that this disclaimer was allowable because it excluded an accidental disclosure in document D1, a doctoral thesis  "
• "G 1/03, a disclaimer which is not disclosed in the application as filed is allowable to restore novelty by delimiting a claim against, inter alia, an accidental anticipation under Article 54(2) EPC. An anticipation is accidental if it is so unrelated to and remote from the claimed invention that the person skilled in the art would never have taken it into consideration when making the invention"
• "D1 is therefore concerned with the preparation and use of a liquid transglutaminase solution for non-toxic cross-linking of a product for use in humans. This is a similar purpose as that described in the patent for the claimed preparation which [is ~PdL]  the cross-linking of proteins in food industry (paragraphs [0002] and [0003] of the patent). The disclosure in D1 is hence not so unrelated and remote from the patent that a skilled person would never have taken it into account when working on the invention, as required by G 1/03"
• "As to the [patentee's]' assertion that if the appellant's arguments were followed, an undisclosed disclaimer could never be drafted, the board notes that an undisclosed disclaimer is indeed an exception that is allowable only under very particular circumstances. The conditions for qualifying as an accidental disclosure are therefore by its very definition rarely met. Hence, this argument is unconvincing. 
• The auxiliary request deleting the product claim, keeping the method claim, was filed after the Board issued their preliminary opinion and is not admitted. 

EPO 

The link to the decision is provided after the jump.

https://www.epo.org/en/boards-of-appeal/decisions/t240324eu1