He first offered his invention to the Bettis Rubber Company , for whom he worked at the time , but they turned it down because the material was not very durable .
Stingley sought uses for his Polybutadiene synthetic rubber , as well as someone to manufacture it .
Stingley first offered Stingley 's invention to the Bettis Rubber Company , for whom he worked at the time , but they turned it down because the material was not very durable .
Stingley sought uses for his Polybutadiene synthetic rubber , as well as someone to manufacture it .