Tackifiable acrylic emulsion pressure-sensitive adhesive having excellent low temperature performance
CA 2050583 C · Owner: Zawadzki, Mary E. · Inventors: Zawadzki, Mary E.; Norman, Richard James; Lee, Ivan Sou Phong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An emulsified pressure sensitive adhesive is provided which is based polymer containing from about 95 to 97.5 % by, weight of an alkyl ester of acrylic acid and from about 2.5 to 5 % by weight of a mixture of carboxylic acids and a three component anionic surfactant system. The polymer is preferably tackified.
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 February 1, 1991 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 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.