Bituminous compositions having enhanced performance properties
CA 2187481 C · Owner: Air Products And Chemicals, Inc. · Inventors: Jones, David Reese, Iv; Welliver, William Russell; Grzybowski, Kenneth Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bituminous compositions of enhanced physical/performance properties comprising a combustion product of a naturally occurring asphalt from the Orinoco Belt of Venezuela and the bitumen base material and methods for their preparation.
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
- Filed October 9, 1996 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 9, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2018.
- 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.