Process of Hardening Bitminuous Substances.
Description:
Patent for "a process for hardening or partly solidifying to any required degree substances such as liquid or viscid bitumens, tars, or asphaltums, either natural or artificial" (lines 8-12). It hardens bitumens without evaporating oils and leaves them solid when cooled.
Date:
August 11, 1896
Creator:
Dumble, Edwin Theodore
Item Type:
Refine your search to only
Patent
Partner:
UNT Libraries Government Documents Department