Plastic powder coated metal strip
CA 2035609 A1 · Owner: Winkle, Sherman E. Sr. · Inventors: Winkle, Sherman E. Sr.; Cockerham, Lloyd E.; Myers, Frederick A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process and apparatus for forming a plastic coating on a metal strip A metal strip is cleaned, surface treated coated with an electrostatically charged plastic powder in an enclosed chamber using a plurality of spray guns positioned on both sides of the strip, inductively heated to above the melting point of the powder, and maintained in an infrared heater until the fused powderis flowed into a coating having a smooth surface and a uniform thickness. Thermoplastic and thermosetting coatings having thicknesses of at least 10, microns formed using total induction and infrared heating times of less than 60 seconds, can be fabricated without cracking. 21
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 February 4, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2013.
- 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.