Temporary protective aqueous coating composition
CA 2000511 A1 · Owner: Cook, John A. · Inventors: Cook, John A.; Roberts, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PV 34943, ABSTRACT, "TEMPORARY PROTECTIVE AQUEOUS COATING COMPOSITION" A coating composition for providing (especially temporary protective) coatings on surfaces (especially the hydrophobic paintwork of newly finished motor vehicles) which comprises particulate copolymer dispersed in water containing less than 10 wt% of volatile organic solvent. The particulate copolymer comprises 7 to 14 wt% acrylic or methacrylic acid, 0.1 to 10 wt% hydrophilic monomer (eg. methacrylamide) and other monomers. The coatings are transparent, abrasion resistant tenacious yet easily removable to produce environmentally acceptable effluent.
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 12, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
- 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.