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Spanish courts reject appeal over patents for drop-in refrigerants

The Spanish courts have rejected an appeal by Du Pont against a patent court ruling over the drop-in R22 replacements R424A and R434A


The Provincial Court in Barcelona has rejected Du Pont’s appeal over the patents for R424A and R434A, which the refrigerant giant claimed was an infringement of a product it distributed. Du Pont is exclusive licensee for R422D for the patent owner Star Refrigeration.

Refrigerant Solutions Ltd (RSL) has reassured its customers in Spain therefore that using its refrigerants R424A and R434A, branded RS-44 and RS-45, will not result in the further threat of patent infringement.

RSL’s Spanish distributors Gases Research Innovation & Technology (GRIT) and Gas Servei had been issued with a writ in February 2013, but the Provincial Court upheld the original judgement of the Patent Court, awarding all costs against Du Pont.

RSL said it had made every effort to avoid this damaging dispute. The company said: “It is quite clear that both RS-44 and RS-45 were not foreseen by the Star Refrigeration patent, being fundamentally different to anything envisaged in this patent.”

“RSL welcomes the decision of the Barcelona court, thereby enabling GRIT and Gas Servei to continue deploying RS-44 and RS-45 as easy to use replacements for R22 in the air conditioning and refrigeration market, which provide customers with increased choice and competition.”

“RSL will defend its intellectual property in a responsible manner in order to market its products in all territories where its patents have been filed.”

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