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Guidance: Requests to amend a patent after grant

Intellectual Property Office

February 14
04:30 2024

In the table below we provide you with information about applications we have received to amend the specification of a patent under sections 27 and 75 before the court and the Office. The table also includes information about when you need to file an opposition if you wish to oppose the application to amend.

Where amendments have been filed electronically, you can obtain full details by selecting the patent number. If you are the patent owner(s), you should check these details carefully and inform us if there are any problems. Where amendments have been filed in paper form only, the symbol * appears in the table after the patent number.

In the case of amendments filed under section 75 before the court and under section 27 at the Office, reasons for the amendments are also provided.

You can obtain reasons for the amendments and full details of any amendments filed in paper form by contacting Litigation Section (telephone: +44 (0)1633 814334).

Opposition procedures

Section 75 before the court

If you want to oppose an amendment filed under section 75 before the court, you need to file a notice of opposition at the court. In the notice you need to set out clearly your reasons for opposing the amendment. You need to send us a copy of the notice and send a copy to anyone involved in the court proceedings. You need to do this within 14 days of the advertisement on our web site of the application to amend.

Section 75 before the comptroller and section 27 amendments

If you want to oppose an amendment filed under section 75 before the comptroller or an amendment filed under section 27, you need to complete and send us:

  • 2 copies of form 15 with the fee of 50. You will need to pay a further fee of 350 later
  • 2 copies of a statement setting out fully the facts of your case and what you want us to do

Opposition table 2024

Section Patents Journal Deadline for filing opposition Patent number and title International Classification Proprietor, including court action number (if any) and address for service
27 7030

14 February 2024
4 weeks EP2925100 (PDF, 53.7 KB, 3 pages)

Busbars
B32B Strip Tinning Limited
75 Before the Court 7029

7 February 2024
14 days EP3928688 (PDF, 157 KB, 4 pages)

Transcutaneous analyte sensors, applicators therefor, and needle hub comprising anti-rotation feature
A61B Dexcom, Inc

HP-2023-000016

Bird & Bird LLP
12 New Fetter Lane
London
EC4A 1JP
27 7029

7 February 2024
4 weeks GB2557321 (PDF, 80.3 KB, 4 pages)

Apparatus for an artificial reef and method
E02B ARC-Marine Ltd
75 Before the Court 7028

31 January 2024
14 days GB2524304 (PDF, 3.69 MB, 8 pages)

Attachment for a hand held appliance
A45D Dyson Technology Limited

HP-2023-000027

Gowling WLG (UK) LLP
4 More London Riverside
London
SE1 2AU
75 Before the Court 7027

24 January 2024
14 days EP2576801 (PDF, 116 KB, 2 pages)

Extraction of lipid from cells and products therefrom
C12P DSM IP Assets B.V.

Powell Gilbert LLP
85 Fleet Street,
London
EC4Y 1AE
75 Before the Court 7027

24 January 2024
14 days EP3530740 (PDF, 276 KB, 8 pages)

Thraustochytrids, fatty acid compositions, and methods of making and uses thereof
C12N DSM IP Assets B.V.

Powell Gilbert LLP
85 Fleet Street,
London
EC4Y 1AE
75 Before the Court 7026

17 January 2024
14 days EP3730045 Amentment Annex A (PDF, 1.37 MB, 20 pages)

Method for inserting analyte sensor
A61B Abbott Diabetes Care, Inc.

IP-2023-000012

Taylor Wessing LLP,
Hill House
1 Little New Street
London
EC4A 3JR
75 Before the Court 7026

17 January 2024
14 days EP3766408 Amendment Annex A (PDF, 79.5 KB, 1 page)

Medical device inserters
A61B Abbott Diabetes Care, Inc.

IP-2023-000012

Taylor Wessing LLP,
Hill House
1 Little New Street
London
EC4A 3JR

Opposition table 2023

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Section Patents Journal Deadline for filing opposition Patent number and title International Classification Proprietor, including court action number (if any) and address for service
27 7021

13 December 2023
4 weeks GB2575229 - Amended claims (PDF, 15.9 MB, 30 pages)

Ink composition comprising siloxane surfactant and metal conductivity salt
C09D Domino Printing Sciences PLC
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