Bonded chromatographic stationary phase
CA 1308613 C · Owner: Birkbeck College · Inventors: Khong, Tech M.; Simpson, Colin F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An organic compound is bonded to a powdered solid support to produce, for example, a chromatographic stationary phase by introducing, to a bed of the powdered material the vapour of a precursor of the compound to be bonded which precursor is selected from those which produce a gas phase by-product of the bonding reaction. The gas generated by the reaction is utilised as the fluidising gas. This permits the use of fluidised bed techniques on extremely low particle size powders. One example is the reaction of alkylchlorosilanes with silica gel to produce stationary phases with bonded carbon chains derived from the alkyl groups, of up to 24 carbon atoms. A second feature of the method is the …
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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
- Granted October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 2009.
- 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.