Expired Canadian patentCanada
Melt blowing die
CA 2010860 C · Owner: Reifenhaeuser Gmbh & Co. Kg Maschinenfabrik · Inventors: Buehning, Peter G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A die tip of a meltblowing die is mounted on the die body to provide a residual compressive force in the die tip nosepiece thereby resisting internal extrusion pressures.
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 February 23, 1990 and granted April 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 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.
FiledFebruary 23, 1990
GrantedApril 21, 1998
Term endedFebruary 23, 2010
Patent numberCA 2010860 C
Classification (IPC)D01D4/02 +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.