Solventless silicon release coating
CA 2035964 A1 · Owner: Melancon, Kurt C. · Inventors: Melancon, Kurt C.; Kessel, Carl R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to solventless curable, polyorganosiloxane compositions and in particular, to, solventless, curable polyorganosiloxane compositions that can be used to prepare release coatings. Solventless silicone compositions generally provide release surfaces that exhibit a sticky or rubbery feel, which is disliked by users of certain types of transfer tapes. Users of large transfer tapes, e.g. tapes consisting of a layer of a pressure-sensitive adhesive borne on a removable silicone release liner, prefer to place the tape on the desired substrate, then press the tape down firmly with their hand or forearm, remove the silicone release liner and then press the second substrate in …
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 7, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 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.