Polysiloxane packed gas chromatographic columns
CA 1099441 A · Owner: Toray Silicone Company, Ltd. · Inventors: Ohwaku, Yoshinari; Yamamoto, Yokichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Packing materials for gas chromatography columns is disclosed. The columns can be used to separate polar compounds with low boiling points. The packing materials which consist mainly of particulate RSiO3/2 resin where R, is alkyl, aryl or alkenyl, have excellent separation efficiencies.
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
- Granted April 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 1998.
- 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.