Spreader roll
CA 2504849 A1 · Owner: Stowe Woodward Ag · Inventors: Niemeyer, Friedel
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 spreader roll comprising a tubular roll shell (2) whose curvature can be adjusted. Said roll shell is configured from continuous tubes consisting of a reinforced plastic composite material and is supported by means of bearings (13) in a rotationally fixed central region. Said central region is formed by a flexible shaft (1). The external surfaces of the bearings (13) lie on the internal wall of the roll shell (2) or on an external annular sheath (3). The internal surfaces of the bearings (13) lie on the surface of the flexible shaft (1) or on an internal fixed sheath (4) that surrounds said shaft.
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 December 6, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2025.
- 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.