Construction material containing bituminous substances
CA 1331237 C · Owner: Muramatsu, Ichiro · Inventors: Okoshi, Noboru; Ito, Takahiko; Sato, Toru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a construction material containing bitumen comprising (A) a polyol component, the polyol component consisting essentially of (a-1) a hydroxy-polyoxyalkylene ether of bisphenol A and/or bisphenol F, and (a-2) an aliphatic polyol, (B) a polyisocyanate component (C) a, bitumen, and/or (D) an aggregate. The construction material has improved water-proof and mechanical properties.
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 August 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
- 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.