Polyolefin compositions for use with water systems
CA 1311072 C · Owner: Shell Oil Company · Inventors: Hayden, Earl Enright
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
T-4006 (US), DB/WKBB:knl, ABSTRACT OF THE DISCLOSURE An improved polyolefin composition having improved resistance to deterioration in the presence of chlorinated and nonchlorinated water and having improved resistance to temperatures in the range of about 0°C to about 110°C consisting of a blend of: (a) about 93 to about 99.5 percent by weight of an isotactic alpha olefin polymer having 2-6 carbon atoms; (b) about 0.05 to about 0.50 percent by weight of a hindered amine U.V. stabilizer;, (c) about 0.05 to about 1.1 by weight of a hindered phenolic thermal stabilizer having a molecular weight above 530 and selected from the group consisting of:, …
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 December 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 2009.
- 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.