Defendant
1 case as defendant.
L'Air Liquide SA pour l'Etude et l'Exploitation des Procedes Georges Claude, commonly known as Air Liquide S.A., is a French multinational corporation and a world leader in industrial and medical gases, technologies, and services. Founded in 1902 by Georges Claude and Paul Delorme, the company's full name references Claude's foundational work in air liquefaction processes. Headquartered in Paris, France, Air Liquide is a publicly traded company listed on Euronext Paris (AI), and is a component of the CAC 40 index. As of 2023-2025, the company employs approximately 65,000 to 67,800 people worldwide and reported revenues of around €27.05 billion in 2024, with a market capitalization exceeding €100 billion as of March 2024.
Air Liquide's operations encompass the production and distribution of essential industrial gases such as oxygen, nitrogen, hydrogen, argon, and carbon dioxide. The company serves a wide array of industries, including healthcare (providing medical gases, home healthcare for chronic illnesses, and medical devices), electronics (supplying ultra-high purity gases and advanced materials for semiconductors and displays), chemicals, metallurgy, refining, food and beverage, automotive, and aerospace. Additionally, Air Liquide provides engineering and construction services for industrial gas production plants and is heavily involved in developing solutions for the energy transition, particularly in hydrogen production and carbon capture technologies.
In terms of patent litigation, L'Air Liquide SA pour l'Etude et l'Exploitation des Procedes Georges Claude maintains a posture typical of an operating company defending its intellectual property. The company is recorded as a defendant in one tracked case, with zero plaintiff appearances. This single case, TOPSOE, INC. v. L'Air Liquide SA pour l'Etude et l'Exploitation des Procedes Georges Claude, is an Inter Partes Review (IPR) proceeding initiated at the Patent Trial and Appeal Board (PTAB).
The notable PTAB case, filed in August 2025, challenges U.S. Patent No. 11,673,805, which is titled "PROCESS AND PLANT FOR PREPARATION OF HYDROGEN AND SEPARATION OF CARBON DIOXIDE." This patent's subject matter directly aligns with Air Liquide's strategic focus on hydrogen development and carbon emissions reduction, underscoring its role as an innovator and patent owner in these critical technology areas.
TOPSOE, INC. filed an Inter Partes Review petition against L'Air Liquide SA pour l'Etude et l'Exploitation des Procedes Georges Claude challenging US patent 11673805, which has been instituted by the PTAB.