Method for the manufacture of pressure sensitive adhesives
CA 2583963 C · Owner: Wolter, James T. · Inventors: Zhu, Dong-Wei; Wolter, James T.; Moore, Cheryl L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the manufacture of an adhesive id described comprising: (A) , Providing an initial reaction product of a solution polymerization reaction the initial reaction product comprising polymer unreacted polymerizable , reactant, non-polymerizable material and solvent; and (B) Purifying the , initial reaction product by adding an oxidizing agent and a reducing agent to the initial reaction product and allowing the unreacted polymerizable reactant in the initial reaction product to further react thereby providing a second , reaction product comprising additional polymer and a lower level of unreacted polymerizable reactant than was present in the initial reaction product. …
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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 October 13, 2005 and granted October 1, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 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.