5 Gilsonite: The trademark, registered in 1921, belongs to the American Gilsonite Company which filed for bankruptcy and after accepting re-organization seems to emerge from it at Jan 3rd 2017. (www.youtube.com) posted 1 year ago by Questionable 1 year ago by Questionable +6 / -1 5 comments share 5 comments share save hide report block hide replies
https://en.wikipedia.org/wiki/Asphaltite