PERSON@1 , Jr. -LRB- May NUMBER@1 , NUMBER@2 -- November NUMBER@3 , NUMBER@4 -RRB- , was an MISC@1 mechanical engineer turned chemist .

PERSON@1 -LRB- born NUMBER@1 May NUMBER@2 ; died NUMBER@3 November NUMBER@4 -RRB- , was an MISC@1 inventor .
