In 1924 , a delegation from the American Sinclair Oil Corporation visited Shukhov .
In its earlier versions it was a batch process , rather than continuous , and many patents were to follow in the USA and Europe , though not all were practical .
In 1924 , a delegation from the USA Sinclair Oil Corporation visited Shukhov .
In its earlier versions it was a batch process , rather than continuous , and many patents were to follow in the USA and Europe , though not all were practical .