Bituminous roof sheeting
CA 1297833 C · Owner: Rutgerswerke Aktiengesellschaft · Inventors: Scherp, Ernst; Ruhl, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roof sheeting having an extraordinarily large plasticity range based on elastomer-modified bitumen is obtained with a coating composition from a bitumen/rubber mixture in the ratio of 17:3 to 19:1 after the finished sheeting has been irradiated with a radiation dose of between 6 and 16 x 104 Gy.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.