Polymeric composition useful for hot water pipe service
CA 1237225 A · Owner: Shell Oil Company · Inventors: Chatterjee, Ananda M.; Hayden, Earl E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A polymeric composition especially useful in extruding pipes for hot water service comprises a butene-l homopolymer sterically, hindered phenolic antioxidant lauryl-stearyl thiodipropionate, nucleating agent mineral filler coated with acid acceptor and pigment.
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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- 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.