Alkylmethylsiloxane containing perfume compositions
CA 2091664 C · Owner: Krzysik, Duane G. · Inventors: Legrow, Gary Edward; Krzysik, Duane G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition which is an emulsifier-free mixture of a perfume oil and a cyclic alkylmethylsiloxane having the formula, (see formula I), in which x and y are each integers and the sum of x and y is four, five or six. with the proviso that x and y cannot be zero; and z is an integer having a value of 5-50.
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 March 15, 1993 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.