Adhesives having a microreplicated topography and methods of making and using same
CA 2274750 C · Owner: Sher, Frank T. · Inventors: Meixner, Larry A.; Sher, Frank T.; Calhoun, Clyde D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method of controlling the topography of an adhesive surface, comprising: contacting a microembossed pattern which is a , surface having a three-dimensional pattern that generates a maximum difference of , less than 45 µm in the surface topography of a continuous adhesive to a , layer of , adhesive and forming thereby a patterned continuous pressure sensitive adhesive , surface having a topography in at least one major substantially continuous , surface , that is substantially the inverse of the microembossed pattern such that when an , adhesion interface is established between the patterned layer of adhesive and a , supporting substrate, the adhesive has a …
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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 May 30, 1997 and granted January 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2019.
- 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
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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.