Fiber treatment agent
CA 2050992 C · Owner: Dow Corning Toray Silicone Company, Ltd. · Inventors: Ona, Isao; Ozaki, Masaru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The amino groups of an organopolysiloxane are reacted with an acrylic acid or ester compound to provide a fiber-treating composition which is almost completely free of yellowing, while at the same time being characterized by an excellent softness and smoothness.
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 September 9, 1991 and granted January 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2013.
- 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.