Alloys of immiscible polymers
CA 2275690 A1 · Owner: Delucia, Mary Lucille · Inventors: Marmon, Samuel Edward; Delucia, Mary Lucille; Hudson, Robert Leslie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extrudable composition is provided which is made from at least two thermoplastic polymers in a biconstituent construction. One of the thermoplastic polymers is present as a dominant continuous phase and the other one or more polymers are present as a non-continuous phase or phases in an amount less than about 15 weight percent. No compatibilizer is necessary. The polymer of the non-continuous phase or phases has a polymer melt temperature less than 30 ~C below the polymer melt temperature of the continuous phase. The polymer of the dominant phase may be for example, polypropylene and the , non-continuous phase may be for example, polyamide. The extrudable composition may be used …
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 December 11, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2019.
- 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.