Expired Canadian patentCanada
Device and process for the visualization of substance stains on layer chromatograms
CA 2010782 C · Owner: Muller, Walter · Inventors: Muller, Walter
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a device and to a process for the visualization of substance stains on layer chromatograms, which device has foil of at least one layer and comprises one or more reagents for the visualization of substance stains.
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 January 28, 1997. 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
GrantedJanuary 28, 1997
Term endedFebruary 23, 2010
Patent numberCA 2010782 C
Classification (IPC)G01N21/78 +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.