Highly crystalline polypropylene
CA 1300312 C · Owner: Mori, Kinya · Inventors: Matsuda, Kiyoshi; Mori, Kinya; Namiki, Ichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A highly crystalline polypropylene (PP) from which highly stiff molded products can be produced and also which can be used for use applications for which conventional PP could not have been used is provided which PP is characterized by the following conditions (A) and (B):, (A) its melt flow rate (MFR) and absorbance ratio according to the method of infrared absorption spectra (IR-?; an absorvance ratio of a wave-number of infrared rays of 997 cm-1 to that of 973 cm-1) satisfy an equation of IR-? ? 0.0203 log MFR + 0.950 and its MFR is in the range of 0.1 to 200; and, (B) when a dilute solution of the PP dissolved in xylene is slowly cooled with stirring, an initially deposited component in …
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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 May 5, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 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.