Method of forming lines of weakness in or grooving a plastic material, especially a packaging material
CA 2017122 C · Owner: Huizinga, Gert Jan · Inventors: Huizinga, Gert Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of forming lines of weakness in or grooving a plastic material, especially a packaging material by local, vaporization or degradation by means of a laser beam which, laser beam and which plastic or packaging material can be moved in relation to each other, wherein the laser beam is generated by means of a wavelength tunable laser tuned to a wavelength selected on the basis of the wavelength depending absorption spectrum of the material to be processed.
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 May 18, 1990 and granted November 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 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.