Butene-1 copolymer
CA 1319783 C · Owner: Imabayashi, Hideki · Inventors: Yamawaki, Takashi; Imabayashi, Hideki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with a butene-1 copolymer containing ethylene units and butene-1 units within a molar ratio from 1 : 99 to 15 : 85 in which the intrinsic viscosity for the copolymer is within a range from 0.9 to 7.0 dl/g the ratio, of weight average molecular weight/number average molecular weight is within a range from 4 to 15 the temperature difference between the highest value and the lowest value of the melting point of the copolymer measured by differential thermal scanning analysis is 2°C or higher, the ethylene block property of the copolymer measured by NMR spectroscopy is not more than 0.015, and the content of the boiling diethyl ether soluble ingredient in the …
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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- 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.