Expired Canadian patentCanada
Method of detecting foreign matter in pulp suspension and device for detecting the same
CA 2106211 C · Owner: Aikawa Iron Works Co. Ltd. · Inventors: Aikawa, Yoshihiko
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sampled pulp suspension is diluted by adding water and separated into foreign matter and effective fiber. The water containing separated foreign matter is the object to be detected. Foreign matter in the pulp suspension is detected.
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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 September 14, 1993 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 14, 1993
GrantedSeptember 21, 1999
Term endedSeptember 14, 2013
Patent numberCA 2106211 C
Classification (IPC)G01N1/34 +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.