Polysaccharides with alkyl-aryl aromatic hydrophobes and latex compositions containing same
CA 2008935 C · Owner: Union Carbide Corporation · Inventors: Hoy, Richard C.; Brode, George L. Ii; Partain, Emmett M. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polysaccharides, including hydroxyethyl cellulose, having alkyl-aryl hydrophobic substitution, provide latex compositions such as, paints, with improved rheology and stability. Improved processes for producing such polysaccharides are also provided.
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 January 30, 1990 and granted February 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2012.
- 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.