Encapsulation process
CA 1054311 A · Owner: Unilever Limited · Inventors: Alterman, David S.; Chun, Kil W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Particles of an organic chlorine bleaching agent are coated with a complete and continuous coating by spraying. The coating is a fatty acid, preferably having 12-20 carbon atoms, and when a second coating is applied by treatment with a solution of an alkali hydroxide e.g. sodium, potassium, or calcium hydroxide effective, completely coated, non-pinholing bleach particles are obtained.
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 May 15, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 1996.
- 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.