It's made for commercial bakeries...as far as I know it's still made....but perhaps not sold in that can.
Linda C

Name trademarked 1954. Trademark lapsed 1996.

http://www.trademarkia.com/kneedit-71658938.html

Does it have a barcode label on it? Lack of a barcode would probably mean that it was older, as opposed to newer.

I see "Wesson Product" written on the can. Maybe it was once owned by the Wesson Oil people? I checked out lazygardens link and thought maybe Wesson sold the line to the company that owns it now? Just a thought.

See the link for information on the "Kneedit" trademark. The trademark was registered by "The Southern... /Wesson" company, and it has been allowed to expire.

Here is a link that might be useful: Kneedit trademark