Capillary column and method of making
CA 2341238 A1 · Owner: Wang, Dongxin · Inventors: Wang, Dongxin; Malik, Abdul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new and useful structure for forming a capillary tube (10) e.g. for gas , chromatography, and a technique for forming the capillary tube (10) is described. The capillary tube (10) comprises a tube structure (12) and a , deactivated surface-bonded sol-gel coating (14) on a surface (16) of the tube structure (12) to form a stationary phase coating (14) on that surface (16) of the tube structure (12). According to the present invention the deactivated stationary phase sol-gel coating (14) enables separation of analytes while minimizing adsorption of analytes on the separation column structure (12).
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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 August 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.