Polypropylene resin for high-rigidity molded products
CA 1193396 A · Owner: Chisso Corporation · Inventors: Sato, Akihiro; Harada, Takakiyo; Kumahara, Katsumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polypropylene resin from which high-rigidity molded products can be produced even when no particular additive is added, is provided, which resin has a melt rate of 0.1 to 100, a density or 0.905 to 0.936 and, a boiling n-heptane-insoluble part whose isotactic pentad ratio (Po) is 0.975 to 0.995, and whose pentad ratio (P2) having two different kinds of configurations of 0.002 to 0.000%, and preferably has a melting point of 165° to 170°C as measured by differential scanning calorimetry.
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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 September 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 2002.
- 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.