Pyrrolidone-carboxylic modified polysiloxanes having aqueous and detergent solubilities and water-in-oil emulsion capability
CA 2572138 C · Owner: Anderson, Steven J. · Inventors: Premachandran, Ramannair Sarasamma; Anderson, Steven J.; Gormley, John L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The properties of 2-pyrrolidone-4-carboxylic substituted polysiloxanes can be dramatically altered by increasing the presence of the carboxylic-substituted pyrrolidone monomer of the polysiloxane such that the amidopolysiloxane has , an acid equivalent weight of about 3:00-3,000 daltons and a molecular weight average Mw of about 1,000-60,000 daltons resulting in enhanced detergent and water solubilities and the ability to form water-in-oil emulsions thereby providing usefulness across a broad range of formulations having enhanced electrolytic and silicone and/or hydrocarbon compatibility and cleansing properties.
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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 April 28, 2005 and granted June 10, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.