Paint spray booth treatment of waterborne coatings
CA 2083984 A1 · Owner: Betzdearborn Inc. · Inventors: Mitchell, David Brian; Curran, Thomas Peter
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 a novel method for coagulating waterborne paints in paint spray booth recirculating water. The coagulant aid comprises a polynucleate hydroxy silicate-sulphate compound (hereinafter PASS) having the following average composition of the general formula:, Al(OH)B(SO4)C(SiOX)D(H2O)E wherein B ranges from 0.75 to 2.0; C ranges from 0.30 to 1.12; D ranges from 0.005 to 0.1; X is greater than 2.0 but less or equal to 4.0 such that, 3=B+2C+2D(X-2) E is 1.5 to 4 when the product is in solid form; and E is larger than 4 when the product is in aqueous form which, may optionally be used together with alum or a mixture of alum and a polyamine. The coagulant aids of this …
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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 November 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 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.