Clear antiperspirant gel stick and method for making same
CA 2103086 C · Owner: Ayala, Nelson · Inventors: Giovanniello, Rocco; Ayala, Nelson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing a diol soluble antiperspirant active comprises reacting an antiperspirant compound with a water soluble, normally liquid diol in a water solution. The compound is heated for about 1 to about 100 hours at a temperature of about 50°C to about 110°C. Zinc glycinate is added to the reaction mixture and the water is removed to recover a powdered antiperspirant active.
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
- Filed November 15, 1993 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2015.
- 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.