Patents Assigned to Dr. Kohl GmbH
  • Polymer bitumen web
    Patent number: 4911975
    Abstract: A polymer bitumen web for roof covering or the like has a black polymer bitumen sealing layer on the underside of a fabric support and a cover layer which is light colored and preferably white on an upper surface of the support to reflect impinging solar radiation.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: March 27, 1990
    Assignees: Dr. Kohl GmbH, CIE Dachbelag-und Bautenschutzmittel-Fabrik
    Inventor: Kurt Schult
  • Thermally bondable roofing material
    Patent number: 4731284
    Abstract: A roof covering material is comprised of a polybitumen sealing web composed of a thermally weldable closed homogeneous sealing layer formed along an underside with parting and pressure equalizing means affording fluid communication over an internal region of juxtaposition of the web with a roof surface, and a support of a filamentary web impregnated with a polymerbitumen on an upper surface of the substantially fluid-impermeable web.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: March 15, 1988
    Assignee: Dr. Kohl GmbH & Cie Dachbelag- und Bautenschutzmittel Fabrik
    Inventors: Dieter Hailer, Kurt Schult