Improvements to methods and machines for making packing materials by crumpling paper
CA 2187806 C · Owner: Naturunion (Nu) · Inventors: Baumuller, Theodore
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for making a packing material from a stack of paper sheets by folding the sheets over lengthwise moving the folded paper stack, crumpling the paper and assembling the crumpled paper by applying pressure at a series of points wherein the folding, moving, crumpling and assembling steps are carried out in a series of separate stations.
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 April 5, 1995 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2017.
- 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.