Method for tinting a sheet of polyurethane
CA 1189655 A · Owner: Corning Glass Works · Inventors: Roger, Francoise M.M.; Marsaud, Serge G.; Goepfert, Serge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of tinting a sheet of transparent polyurethane comprising a coloring operation followed by a fixation operation. The aforesaid coloring operation is carried out through immersion of the polyurethane into a bath maintained under continuous agitation and formed of a dispersion of one or several colorants in an aqueous solution containing a surfacant or wetting agent, while the aforesaid fixation operation is carried out through rinsing in boiling aqueous solution of sodium alkyl sulfonate of the type known under the mark "teepol".?, The application to a double or composite sheet preformed to a thin laminate, that is to say, one layer of a thermoplastic polyurethane and one other …
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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
- Granted July 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2002.
- 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.