Fed. Circ. Explains Rule While Upholding Merck PTAB Loss

By Ryan Davis · October 30, 2025, 8:14 PM EDT

The Federal Circuit sided with generics makers Thursday and upheld the Patent Trial and Appeal Board's invalidation of claims in two Merck KGaA patents on the blockbuster multiple sclerosis drug Mavenclad, while clarifying...

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Case Information

Case Title

Merck KGaA et al v. Accord Healthcare, Inc.

Case Number

1:22-cv-00974

Court

Delaware

Nature of Suit

Patent - Abbreviated New Drug Application(ANDA)

Date Filed

July 25, 2022


Case Title

Merck KGaA et al v. Hopewell Pharma Ventures, Inc., et al.

Case Number

1:22-cv-01365

Court

Delaware

Nature of Suit

Patent - Abbreviated New Drug Application(ANDA)

Date Filed

October 17, 2022


Case Title

Merck KGaA et al v. TWi Pharmaceuticals, Inc. et al

Case Number

1:24-cv-00700

Court

Delaware

Nature of Suit

Patent - Abbreviated New Drug Application(ANDA)

Date Filed

June 14, 2024


Case Title

Merck Serono S.A. v. Hopewell Pharma Ventures, Inc.

Case Number

25-1210

Court

Appellate - Federal Circuit

Nature of Suit

Date Filed

November 25, 2024


Case Title

Merck Serono S.A. v. Hopewell Pharma Ventures, Inc.

Case Number

25-1211

Court

Appellate - Federal Circuit

Nature of Suit

Date Filed

November 25, 2024


Case Title

Merck Serono S.A. v. TWi Pharmaceuticals, Inc.

Case Number

25-1463

Court

Appellate - Federal Circuit

Nature of Suit

Date Filed

February 19, 2025


Case Title

Merck Serono S.A. v. TWi Pharmaceuticals, Inc.

Case Number

25-1464

Court

Appellate - Federal Circuit

Nature of Suit

Date Filed

February 19, 2025