Expired Canadian patentCanada
Heat-stable rubber compositions based on hydrogenated nitrile rubber
CA 2019367 C · Owner: Lanxess Deutschland Gmbh · Inventors: Szentivanyi, Zsolt; Rohde, Ernst; Thormer, Joachim
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydrogenated nitrite rubbers filled with sodium aluminium silicate suffer relatively little deterioration of the mechanical properties e.g. elongation at break, during hot air ageing.
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 June 20, 1990 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 20, 1990
GrantedJuly 31, 2001
Term endedJune 20, 2010
Patent numberCA 2019367 C
Classification (IPC)C08L9/02 +1 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.