Paint stripper and varnish remover compositions and related methods
CA 2063556 A1 · Owner: Stevens, Edwin · Inventors: Stevens, Edwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to non-toxic non-flammable, safe, compositions employing primarily biodegradable components for use in removing and stripping paint, varnishes and stains from hard and/or flexible surfaces. The compositions generally avoid the use of methylene chloride, methanol, toluol or acetone. Paint stripper compositions of the present invention have flash points above about 120 ·F and an absence of low-boiling VOC's comprising: (a) about 0 % to about 60 % by weight of a terpene compound containing at least 10 carbon atoms; (b) about 10 % to about 69 % by weight of N-methyl pyrrolidone or its equivalent; and (c) about 0 % to about 20 % by weight of an emulsifying …
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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 June 29, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2012.
- 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.