Arkema sues HighChem in Japan over HFO-1233zd(E) patents
Key highlights
- Lawsuit filed July 21, 2026 at the Tokyo District Court (Reiwa 8 (Wa) No. 170625) against HighChem Co., Ltd.
- Seeks an injunction on import and sale of HFO-1233zd(E) (trans-1-chloro-3,3,3-trifluoropropene).
- Asserts Japanese Patent No. 6149000 covering blowing agents for thermosetting foams such as polyurethane foams.
- Also asserts Japanese Patent No. 6205392 covering heat transfer fluid compositions used as refrigerants.
Filing details
Arkema filed a patent infringement lawsuit on July 21, 2026 against HighChem Co., Ltd. before the Tokyo District Court under case Reiwa 8 (Wa) No. 170625.
Relief sought
The suit seeks an injunction against the defendant's import and sale, among other acts, of HFO-1233zd(E), also named trans-1-chloro-3,3,3-trifluoropropene.
Patents asserted
Arkema asserts two Japanese patents held by Arkema Inc.: Japanese Patent No. 6149000, relating to blowing agents for thermosetting foams such as polyurethane foams; and Japanese Patent No. 6205392, relating to heat transfer fluid compositions used as refrigerants.
Company position
Arkema states it will continue to take appropriate measures, including legal action, to protect its intellectual property rights.
Source: Arkema
