Surface modification of semicrystalline polymers
CA 1333379 C · Owner: Ouderkirk, Andrew J. · Inventors: Warner, Robert W.; Dunn, Douglas S.; Ouderkirk, Andrew J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for modifying the surface of a semicrystalline polymer which process comprises irradiating at least one surface of a semicrystalline polymer composition with radiation which is absorbed by said composition controlling the intensity and fluence of said radiation exposure so that semicrystalline polymer on said surface is melted and there is ablation or volatilization of less than 1% by weight of the total weight of the polymer within regions of said polymer which are melted, and allowing said melted polymer to cool at a rate which will form a quasi-amorphous polymeric area on said at least one surface, said quasi-amorphous polymeric area having a thickness …
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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 December 6, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 6, 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.