Method of cutting compressible materials
CA 2108448 C · Owner: Levene, Martin M. · Inventors: Levene, Martin M.; Geffros, Mike
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of cutting stacked layers of compressible material utilizing a steel rule cutting die. An open cell foam member (18, 20) is placed in the area between spaced portions of the cutting die (16) to define a flat upper surface substantially flush with the sharpened upper edge (16a) of the cutting die. The stacked layers (22) of compressible material are placed on top of the foam member (18, 20) and on top of the sharpened upper edge (16a) of the die and the upper platen (10) of the associated press is Powered to precompress the stacked compressible layers (22) prior to the cutting operation by the die. The foam member ( 18 20) is an, open cell member and has a compressibility such …
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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 April 26, 1991 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 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.