Kindeva, a global CDMO and drug delivery innovator, commemorates 70 years since the invention of the pressurized metered dose inhaler (pMDI), a breakthrough therapy that transformed respiratory care. The device’s inventors, Kindeva alumni George Maison, Irving Porush and Charles Thiel will be officially inducted into the ‘National Inventors Hall of Fame’. 

Jeremy Tidmarsh, Vice President of Kindeva’s MDI business unit, said: “From its very beginnings, Kindeva (formerly Riker Laboratories/3M Drug Delivery Systems) set out to discover and manufacture life-saving treatments that will make a real impact on patient lives. 

“It is a great honor for our former colleagues George, Irving and Charles to be nominated amongst some of the most inspiring and influential figures in American history. We look forward to celebrating all that they have accomplished.”  

Introduced to the market back in 1956, the pMDI provided a portable, efficient alternative to fragile squeeze-bulb nebulizers. The device is among the most globally accepted form of treatment for asthma and COPD exacerbations.

Kindeva continues to support the innovation of pMDIs and recently opened its center of excellence in Loughborough, UK, in September 2025. 

Tidmarsh added: “While we celebrate this landmark achievement, our focus is on the future: delivering next-generation propellants that will improve patient lives, help manufacturers meet global sustainability standards and demonstrate Kindeva’s commitment to ongoing innovation in a dynamic marketplace.”