Process for the preparation of polyacethylene
CA 1265645 C · Owner: Petrera, Michele · Inventors: Giunchi, Giovanni; Albizzati, Enrico; Petrera, Michele
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyacetylene having an apparent density at 20°C greater than 0.6 g/ccm and a surface area below 60 m2/g is prepared by po= lymerizing gaseous acetylene in the presence of a catalytic system consisting of:, a) an oxygenized compound of Ti or V containing at least one me=, tal-oxygen bond; b) an organometallic compound of aluminum containing at least one hetero-atom, of the formula:, . wherein: M = O,>S,>N-R,>P-R, while R = a hydrocarbon radical with 1-18 carbon atoms and where R' = R, or halogen or alcoxyl.
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 February 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 2007.
- 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.