Patents Assigned to 373249 B.C. Ltd.
  • Patent number: 4929120
    Abstract: An asphalt-paved road surface is rejuvenated in two stages. First, an exposed upper asphalt layer is heated to a selected temperature and depth. The heated upper asphalt layer is then removed from the road surface to expose a lower asphalt layer. In the second stage of the process, the lower asphalt layer is heated to a selected temperature and depth. The lower layer is then either broken up and left in place, or else it too is removed from the road surface. In the former case, asphalt removed from the upper layer is replaced on top of the ruptured lower layer; in the latter case, asphalt removed from the upper layer is comingled with asphalt removed from the lower layer. The removed/ruptured or comingled asphalt (as the case may be) is then pressed back against the road surface to repave the road.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: May 29, 1990
    Assignee: 373249 B.C. Ltd.
    Inventors: Patrick C. Wiley, Allen H. Rorison