Method of stabilizing hygral expansion of protein fiber product
CA 2118914 C · Owner: Koike, Sachizumi · Inventors: Koike, Sachizumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of stabilizing a hygral expansion of a protein fiber product which comprises the steps of preparing a water-soluble solution by dissolving a polyoxirane derivative of PEGDE or PPGDE having a water solubility of 95 wt.% or above in a solvent which has a solubility parameter of 13.0-10.1 (cal/cm3)1/2 and a boiling point of 101-190°C and is freely miscible with water preparing a treatment solution by adding to the obtained solution an aqueous solution containing at least two catalysts for oxirane compounds selected from the group consisting of dicyanodiamide, hydroxy carboxylic acid salts, thiocyanic acid salts and L-cysteines dipping a, protein fiber product in the treatment solution …
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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 July 19, 1993 and granted June 16, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 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.
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.