Teva Pharmaceutical Industries Ltd v LEO Pharma [2015] EWCA Civ 779

A claim for revocation by TEVA of two patents covering LEO’s fixed combination of calcipotriol and betamethasone for the dermal treatment of psoriasis.

The invention overcame differing pH sensitivities of the two actives by using a unusual solvent in a non-aqueous formulation.   Birss J found the patents obvious over a disclosure of that solvent in a mono-formulation of betamethasone.  He found that the solvent would be obvious to try in the co-formulation.  The Court of Appeal disagreed.  The evidence did not establish that such a trial would have a fair expectation of success.

Henry Carr QC and Tom Alkin acted for Leo.

First Instance [2014] EWHC 3096 (Pat)

Court of Appeal [2015] EWCA Civ 779

Latest News

Anna Edwards-Stuart appointed King’s Counsel

Chambers is delighted to announce that Anna Edwards-Stuart has been appointed King’s Counsel in the 2023 competition, announced on 19th January 2024.

Miruna Bercariu joins 11 South Square

Chambers is delighted to announce Miruna Bercariu has accepted an offer of tenancy after a successful pupillage and will commence practice immediately....

Chambers UK Bar Awards 2023

Chambers is thrilled to announce we have won all three of the awards we were nominated for at the Chambers UK Bar Awards 2023. 11 South Square, IT/IP Set of the Year Brian Nicholson KC, IT/IP Silk of the Year Ka...

Edward Cronan joins 11 South Square

We are pleased to announce the arrival of a new member of chambers, Edward Cronan. Edward first came on to our radar at 11 South Square when he was a solicitor, and we watched his move to the bar in 2018 with interest. S...

Bio-science Law Review – University Inventions: When is a student a consumer?

University Inventions: When is a student a consumer? Oxford University Innovation Limited v Oxford Nanoimaging Limited [2022] EWHC 3200 (Pat) This article provides a case comment on the Judgment of Daniel Alexander KC...

Michael Silverleaf called to the Irish Bar

Chambers is pleased to announce that Michael Silverleaf has been called to the Irish Bar and has appeared in that role as part of a team representing Bristol-Myers Squibb in the Irish High Court before Barrett J. The tri...

Lionel Bently made Honorary King’s Counsel

Chambers is delighted to announce that Lionel Bently has been made an Honorary King's Counsel. Honorary KCs are awarded to those who have made a major contribution to the law of England and Wales, outside practice in...