Release liner incorporating syndiotactic vinyl aromatic polymer
CA 2360154 A1 · Owner: Barrera, Denise A. · Inventors: Harelstad, Roberta E.; Barrera, Denise A.; Pavelka, Lee A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A release liner is provided which has a release surface comprising a syndiotactic polymer. The release liners of the present invention offer release to a wide variety of materials without the application of release agents, have relatively high heat distortion temperatures and are unaffected , by radiation sources used to cure most polymeric compositions. The release liners of the present invention can be microreplicated with a pattern which can be transferred to coatings and other impressionable materials to impart physical or optical properties. Thus, a method of producing a patterned article is also provided, as is a method of producing a solid object from a curable composition.
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 May 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2021.
- 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.