Bitumenous compositions
CA 1256619 A · Owner: Exxon Research And Engineering Company · Inventors: Verrier, Pierre E.M.; Jevanoff, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bitumenous Compositions, Bitumen modified with a modifier system comprising an elastomeric component comprising ethylene-propylene copolymer, a polyolefin component containing polyethylene and optionally polypropylene, a plasticizer and a plasticizer sink has improved high temperature and low temperature properties which make it especially suitable for roofing applications. Said plasticizer and sink function cooperatively to give increased low temperature flexibility and reduced high temperature creep to the composition.
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 June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
- 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.