Bituminous composition
CA 1314642 C · Owner: Vonk, Willem Cornelis · Inventors: Bull, Anthony Leonard; Vonk, Willem Cornelis; Brouwer, Hendrik Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bituminous composition comprising a bitumen an, elastomeric, optionally hydrogenated block copolymer, containing at least two monoalkenyl arene blocks A and at least one conjugated diene block B which composition further comprises a polymer of a monovinylaromatic hydrocarbon of which polymer the number average molecular weight is the range 1/4 to 2 times the number average molecular weight of the polymeric blocks A. PS07002
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 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 16, 2010.
- 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.