High ductility asphalt-sulphur-rubber composition and process therefor
CA 1065987 A · Owner: Phillips Petroleum Company · Inventors: Draper, Homer L.; Gagle, Duane W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An asphalt composition having high ductility at low temperatures is obtained by hot-mixing asphalt and 3 to 7 weight percent of sulfur based on the weight of asphalt, at temperatures below 300°F. Small amounts of rubber further increases the ductility.
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 November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 1996.
- 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.