Hydrophilic surface treatment chemicals, hydrophilic surface treatment bath, and hydrophilic surface treatment method
CA 2023116 A1 · Owner: Nippon Paint Co. Ltd. · Inventors: Meguro, Shigeyuki; Yasuhara, Kiyotada
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydrophilic surface treatment chemicals comprising on a solid basis, (a) 1-10 parts by weight of at least partially saponified polyvinyl acetate having a saponification degree of 45 or more and a polymerization degree of l00-600 (b) 0.3-15 parts by weight of water-soluble nylon and, (c) 0.1-5 parts by weight of a water-soluble amino resin a weight ratio of the component (b) to the total of the components (a) and (c), (b)/(a)+(c), being in the range of 1 - 1/4, and a weight ratio of the component (a) to the component (c), (a)/(c), being in the range of 1/0.05 -1/0.5. The hydrophilic surface treatment bath is prepared by properly diluting the chemicals for surface-treating aluminum members.
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 August 10, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 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.