Expired Canadian patentCanada
Stabilized polyvinyl chloride
CA 2121305 C · Owner: Wehner, Wolfgang · Inventors: Kuhn, Karl; Kolb, Markus; Drewes, Rolf
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Use of an inorganic or organic zinc compound and a terminal epoxide compound gives a, high level of stabilization of PVC.
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 April 14, 1994 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 14, 1994
GrantedAugust 19, 2003
Term endedApril 14, 2014
Patent numberCA 2121305 C
Classification (IPC)C08L27/06 +2 more
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.