Silicone textile finishes
CA 2048890 C · Owner: Union Carbide Chemicals And Plastics Company · Inventors: Czech, Anna Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A durable hydrophilic silicone textile finish is produced on cellulose-containing textiles to impart durable hydrophilic softness and durable press properties to the textile. The silicone finish is produced from an aqueous solution of glyoxal a, reactive organomodified silicone copolymer a glycol, and an acidic catalyst. The treating composition is applied to the textile and cured by heating at an elevated temperature to bond the silicone to the cellulose.
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 August 9, 1991 and granted July 15, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.