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Management Forum

Advanced Drafting Techniques for Successful EPO (European Patent Office) Patent Applications Training Course

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. *INCLUDES: Interactive workshop sessions and details of the latest case law and its implications*

★★★★★ "It was excellent and more than I expected."

24 September 2024 »
from £499

Need help?  Enrol or reserve

Course overview

Many patent applications and patents are lost before the EPO, either before Opposition Divisions or before Appeal. Attending this course will enable you to avoid incorrect original drafting and added subject matter which are recurrent problems in this area.

Amendments made during the grant procedure to incorporate new prior art amount to added subject matter, which is often fatal in opposition procedure before the EPO, and in nullity proceedings before national courts. Sufficiency of disclosure can also be a problem and if initial disclosure is insufficient, amending it can amount to adding subject matter.

The purpose of this 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.

The expert trainer will take you through how to deal effectively with these challenges and ensure you understand how to avoid potential problems with amendments so your patent applications are successful.

The key topics covered include:

  • Article 123(2) – identify and deal effectively with added subject matter
  • How to avoid problems with amendments
  • Article 83 – the importance of sufficiency of disclosure

This course is part of our collection of IP & Patents Training Courses.

Benefits of attending

By attending this course you will:

  • Understand how to identify and deal effectively with added subject matter
  • Learn about the latest decisions of the Enlarged Board of Appeal
  • Get to grips with amendments that are allowable and not allowable under Art 123(2)
  • Consider how to deal with disclosed and undisclosed disclaimers
  • Clarify the interplay between Art 83, Art 84 and Art 56
  • Expand your knowledge of how to avoid problems with amendments
  • Examine Article 83 – the importance of sufficiency of disclosure
  • Discuss sufficiency vs added subject matter

Who should attend?

This course has been designed for:

  • 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 these seminars valuable for updating their knowledge on the latest case law and its implications.

Enrol or reserve

The Advanced Drafting Techniques for Successful EPO Patent Applications course will cover:

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
  • 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
  • Plausibility, especially in the medicine sector
  • Substantiation of lack of sufficiency in opposition
  • 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

Enrol or reserve

Daniel X Thomas
formerly EPO

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.

More details

NEW higher discounts for multiple bookings - bring your colleagues to make your training budget go further:

  • 30% off the 2nd delegate*
  • 40% off the 3rd delegate*
  • 50% off the 4th delegate*

Please contact us for pricing if you are interested in booking 5 or more delegates

24 September 2024

Live online

09:00-17:30 UK (London) (UTC+01)
10:00-18:30 Paris (UTC+02)
04:00-12:30 New York (UTC-04)
Course code 14033

  • GBP 499 599
  • EUR 719 859
  • USD 823 979

Until 20 Aug

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Not ready to book yet?

for 7 days, no obligation

* Early booking discounts may not be combined with other discounts or offers. As such, the discounts for 2nd/3rd/4th delegates are based on the full price; and apply only when booking multiple delegates on the same date.

Reviews of IPI's Advanced Drafting Techniques for Successful EPO Patent Applications training course

It was excellent and more than I expected.

Jun 16 2021

Taemin Kang
patent attorney trainee, NLO

Nov 9 2021

Really good, learnt a lot!!

Diptanil Debbarma
Trainee Patent Attorney, NLO

Jun 12 2019

Very good and practical course.

Rafi Bronstein
Patent Attorney, Daltan Consulting Ltd

Jun 12 2019

I really appreciate Mr Thomas – not only for his huge knowledge and experience about the rules and their application but also his ability to teach and explain in a very clear way.

Sara Miani
Paralegal, GLP SRL

Nov 14 2017

The speaker was perfect and the content of his presentation, as well the way of presenting it, was excellent.

Agneszka Zebrowska-Kucharzyk
European and Polish Patent Attorney, PATPOL

United Kingdom

  • Baytree IP Ltd
  • Cambridge Display Technology Ltd
  • HGF Ltd
  • HTC Europe Co. Ltd
  • Withers & Rogers LLP
  • Xaar Plc
  • Xeros Technology Ltd


  • Budde Schou
  • Budde Schou A/S
  • Guardian IP Consulting
  • Novo Nordisk
  • Novo Nordisk A/S
  • Plougmann & Vingtoft


  • HutPatent BV
  • IZI Patents
  • NLO
  • NLO European Patent and Trademark Attorneys


  • Ion Beam Applications sa
  • Umicore
  • VIB


  • Kolster OY AB
  • Microsoft Mobile Oy
  • Primrose Oy


  • Alfa Laval Corporate AB
  • Bergenstråhle & Partners
  • Valea AB


  • AC Immune
  • F. Hoffmann-La Roche Ltd
  • JTI


  • Mettler Toledo India (GBSI)
  • Tata Steel


  • Yara International ASA


  • EP-Patent


  • BCF


  • Thermo Fisher Scientific (Bremen) GmbH


  • Bic Violex SA


  • Daltan Consulting Ltd





United States of America

  • Microsoft Mobile Oy

Enrol or reserve

Run Advanced Drafting Techniques for Successful EPO Patent Applications Live online for your team

1 day

Typical duration

Pricing from:

  • GBP 450
  • Per attendee, based on 10 attendees
  • Course tailored to your requirements
  • At your choice of location, or online


We can customise this course to your requirements and deliver it on an in-house basis for any number of your staff or colleagues.

Contact our in-house training experts Aleksandra Beer and Yesim Nurko to discuss your requirements:

Multiple colleagues? See above for details of our discounts for 2, 3, or 4 delegates. For more, talk to one of our training experts to discuss how to:

Run this course conveniently and cost-effectively in-house for your staff and colleagues

Aleksandra Beer

Aleksandra BEER
Training expert

Yesim Nurko

Training expert

+44 (0)20 7749 4749