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Refrigerant producer RSL wins case against DuPont and Star Refrigeration over R22 drop-ins

Spanish court rules that producer’s R22 drop-in replacements R424A and R434a do not infringe Star Refrigeration patent, for which DuPont is licensee

Two Spanish distributors for UK refrigerant producer RSL have won their case against DuPont over patent infringement. Gases Research Innovation & Technology (GRIT) and Gas Servei produce and distribute in Spain the Drop-in R22 replacement refrigerants RS-44 (R424A) and RS-45 (R434A).

DuPont had issued a writ against GRIT and Gas Servei alleging infringement of a Star Refrigeration patent of which DuPont is the exclusive licensee.
According to RSL, the Dupont allegation of infringement has been rejected in the Barcelona Patent Court and all claims in the Star Refrigeration patent have been declared void.

RSL said: “Customers using RS-44 and RS-45 do not need to feel concerned that they could face a threat from DuPont of patent infringement in Spain. RSL had made every effort to avoid this damaging dispute, being convinced that the Star Refrigeration patent was invalid, which has been confirmed in this judgement. RSL is disappointed that DuPont has taken this unwarranted and unnecessary action.”

The company added: “It is also quite clear that both RS-44 and RS-45 were not foreseen by this patent, being fundamentally different to anything envisaged in this patent.”

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