Clay-cation complexes
CA 1184189 A · Owner: Nl Industries, Inc. · Inventors: Finlayson, Claude M.; Mardis, Wilbur S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An organophilic clay gellant comprising the reaction product of an organic cationic compound and a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of said clay wherein said organic cationic compound contains (a) a first member selected from the group consisting of a .beta. .gamma.-unsaturated alkyl group and a hydroxyalkyl group hav-, ing 2 to 6 carbon atoms and mixtures thereof, (b) a, second member comprising a long chain alkyl group having 12 to 60 carbon atoms and (c) a third and fourth alkyl member.
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 March 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2002.
- 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.