Low-volatility pressure sensitive adhesives
CA 2080771 A1 · Owner: Tangney, Thomas J. · Inventors: Tangney, Thomas J.; Watkins, James J.; Hanneman, Larry F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pressure sensitive adhesives (PSA) having a reduced volatile fraction content are provided by a process which comprises extracting a cured PSA with a fluid in or near its supercritical state. The process provides PSAs and articles containing PSAs which meet the volatility requirements of ASTM E-595. A silicone PSA transfer film having utility in outer space is obtained.
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 October 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2014.
- 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.