Packing material and process for its production
CA 1293083 C · Owner: Kato, Yoshio · Inventors: Kato, Yoshio; Komiya, Katsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A packing material for chromatography comprising a carrier having silanol groups on its surface wherein Si, in the silanol groups forms a Si-O-Si bond together with Si in a silyl group of the following formula I and Si in a silyl group of the following formula II and the molar, ratio of the silyl group of the formula II is from 0 to 2/3 based on the total amount of silyl groups: (I), wherein each of R1 and R2 is a hydroxyl group a methyl, group, an ethyl group, an alkoxy group having from 1 to 3 carbon atoms, a phenoxy group, an acetoxy group a, trimethylsiloxy group, a triethylsiloxy group or an oxygen atom bonded to Si in a silanol group on the surface of the carrier, R3 is a …
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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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
- 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.