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Chemours “disappointed” at R1234yf patent failure

USA/JAPAN: The recent R1234yf patent infringement lawsuit brought by Chemours against Japanese refrigerant manufacturer AGC was filed after a previous action failed in the Japanese courts.

As reported in the Cooling Post, Chemours filed a second lawsuit in Japan last Friday (November 12), alleging infringement of Chemours’ patents covering product compositions of the HFO refrigerant. 

Chemours has revealed that the second lawsuit was filed the day after the Japanese High Court ruled in favour of AGC in the case of the first litigation filed in November 2019.

Responding to questions from the Cooling Post, Chemours said in a statement today: “This second lawsuit is a continuation of legal action against AGC that started with a lawsuit filed in 2019. On November 11, 2021, the Japanese High Court ruled in favour of AGC in the first patent litigation. While we find it disappointing, the patent relates to the Japan market and does not affect Chemours’ overall patent position.”

AGC says that in the 2019 action its claim of patent invalidity was accepted by the court in both the first and second trial, resulting in a “complete rescinding” of Chemours’ lawsuit.

Furthermore, the Japanese manufacturer says it has filed invalidation proceedings against several of Chemours’ patents, and the patent office has disclosed the advance notice of trial decision that Chemours’ patents are invalid.

Related stories:

Chemours files second lawsuit over R1234yf12 November 2021
USA: Chemours has filed a second R1234yf patent infringement lawsuit in Japan against Japanese refrigerant manufacturer AGC Inc. Read more…

Chemours claims AGC infringed R1234yf patents – 20 November 2019
USA: Refrigerant manufacturer Chemours has filed a patent infringement lawsuit in Japan against Japanese chemical manufacturer AGC over the HFO refrigerant R1234yf. Read more…

Honeywell reports second R1234yf seizure – 17 September 2019
BELGIUM: Refrigerant manufacturer Honeywell has announced a further seizure of patent-busting R1234yf in Poland, the second seizure in that country in just three months. Read more…

Honeywell stops patent-busting R1234yf shipment – 25 July 2019
USA/POLAND: Polish customs authorities have seized a shipment of suspected patent-infringing R1234yf refrigerant at the Baltic port of Gdynia. Read more…

Honeywell gets tough on R1234yf – 30 October 2018
USA: Action by Honeywell has resulted in the seizure of a shipment of R1234yf, with the refrigerant manufacturer filing alleged patent infringement lawsuits in the Czech Republic and Germany. Read more…

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