In-line coating and curing a continuously moving welded tube with an organic polymer
CA 2223563 C · Owner: Allied Tube & Conduit Corporation · Inventors: Mild, Edward E.; Seilheimer, Stephen E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tube product and improvement in the production of coating tubing as most , preferred, includes hot dip galvanized zinc coating of tubing and before , complete solidification of the zinc coating controlled cooling and clear , coating of the tubing with organic polymer coating. The heat of the galvanizing process cures the clear coating and the clear coating preserves a , consistency and reflectivity of the zinc previously unseen in finished products. In additional preferred embodiments organic polymer coatings are , applied to zinc coated and uncoated tubing and the organic polymer coatings , are applied by electrostatic powder coating process.
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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 5, 1996 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2018.
- 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.