Method for improving impact strength in high nitrile polymers by stretching and heat setting
CA 1083318 A · Owner: The Standard Oil Company · Inventors: Isley, Ralph 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, High nitrile polymer articles having improved impact strength and dimensional stability are prepared by stretching in more than one direction a solvent-free thermoformed polymer article having less than 0.5 percent water and then heat setting the oriented article while in a restrained position at orientation temperatures for about 5 seconds to 2.5 minutes.
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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 August 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 1997.
- 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.