Advanced Drafting Techniques for Successful EPO Patent Applications

Many patent applications and patents are lost before the EPO, either before Opposition Divisions or before Appeal due to incorrect original drafting, and added subject matter is a recurrent problem. Learn advanced drafting techniques for successful EPO patent applications.

6 Nov 2019

& 10 Jun 2020 , 4 Nov 2020

GBP 699
EUR 979
USD 1,090

Book now

Course overview

Many patent applications and patents are lost before the EPO Boards of Appeal due to incorrect original drafting. Added subject matter is a recurrent problem: Amendments made during grant procedure, to take account or new prior art, amount to added subject-matter, often fatal in opposition procedure before the EPO, and national courts.

Sufficiency of disclosure can also be a problem, as if initial disclosure is insufficient, amending it can amount to adding subject-matter.

The purpose of the seminar is to identify the problems of added subject-matter and sufficiency of disclosure, and show how they can be easily avoided by careful drafting.

Please note we are also running:

Book both and SAVE

This meeting runs back-to-back with Effective Defence of EPO Patent Applications and there is a £100/€140 discount off Effective Defence of EPO Patents when booked together with this programme.

To register on both events click HERE

To find out more call Customer Services on +44 (0)20 7749 4730 or e-mail

Key topic covered

  • Article 123(2) – added subject matter
  • Avoiding problems with amendments
  • Article 83 – sufficiency of disclosure

Who should attend

  • Qualified European patent attorneys
  • Patent attorneys in private practice
  • Corporate patent attorneys and lawyers
  • People working or training in intellectual property
  • US attorneys working in Europe
  • Trainee patent attorneys
  • EQE Candidates

Those already familiar with the field will find the seminars valuable for updating their knowledge on the latest case law and its implications

Course programme

How to identify and deal effectively with added subject matter at the EPO – Article 123(2)

** Documents of reference for the application of Art 123(2)
** Decisions of the Enlarged Board of Appeal
** Tools available in order to assess added subject-matter
** Main criterion directly and unambiguously derivable
** Examples of amendments not allowable under Art 123(2)
** Examples of amendments allowable under Art 123(2)
** Necessity to indicate amendments and their basis

How to identify and deal effectively with added subject matter at the EPO – Article 123(2) continued

** Added subject-matter and clarity
** Other not allowable cases of adding subject-matter
** Broadening of features or intermediate generalisation
** Revision of the stated technical problem
** Prior art disclosed in the application/patent
** Divisional applications
** Correction of errors
** Added subject-matter and extension of protection
** Disclosed and undisclosed disclaimers

Practical workshop: Exercises to exemplify the concepts learnt

The importance of sufficiency of disclosure – Article 83

** Enabling disclosure
** Objections concerning essential features
** The interplay between Art 83, Art 84 and Art 56
** Sufficiency when overcoming a prejudice
** Fundamental and partial insufficiency
** Sufficiency and Rule 56
** Consequences of a lack of sufficiency at search stage
** Sufficiency vs. Clarity
** Substantiation of lack of sufficiency in opposition

The importance of sufficiency of disclosure – Article 83 continued

** Sufficiency vs. added subject-matter
** Disclaimers and sufficiency
** ‘Reach-through’ claims

Practical workshop: Exercises to exemplify the concepts learnt

Latest case law and its implications for your EPO patent applications

** General case law on sufficiency
** Case law on sufficiency in biotechnology


Daniel X Thomas

Daniel X. Thomas is an electronics engineer by training. He started his career in the patent field as search examiner at the former Institut International des Brevets in The Hague in 1971. After incorporation of the IIB into the EPO in 1978, he was search examiner in the EPO’s DG1. He joined the EPO’s DG2 in 1979 as substantive examiner in the field of computers and memories. He became a Director in DG2 in 1989, and subsequently headed directorates in various fields of electronics, physics and mechanics.

Although he retired from active service at the EPO on 1 January 2013, Daniel continues to be active in the field of training patent specialists. He still regularly gives lectures at different universities over Europe, including CEIPI in Strasbourg, and also leads workshops/seminars relating to various aspects of the European granting procedure for the epi and the Academy of the EPO, including preparation of candidates for the European Qualification Examination, and also ‘grandfathers’ for new Contracting States.

Continuing professional development

This course qualifies for the following CPD programmes:

  • CPD certificate of attendance: 5.50 hours
  • General Council of the Bar: 5.50 hours

Book now

6 Nov 2019
6 Nov 2019 Rembrandt Hotel, London GBP 699.00
EUR 979.00
USD 1,090.00
+ VAT @ 20.00%
Enrol now
10 Jun 2020
10 Jun 2020 Venue not yet confirmed
+ VAT @ 20.00%
Enrol now
4 Nov 2020
4 Nov 2020 Venue not yet confirmed
+ VAT @ 20.00%
Enrol now

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Speaker was perfect and the content of his presentation as well the way of its presenting was excellent

Agneszka Zebrowska-Kucharzyk, European and Polish Patent Attorney, PATPOL