Device for producing coils from spring steel material
CA 2075800 C · Owner: Stop-Choc Schwingungstechnik Gmbh · Inventors: Hoffmann, Martin; Weinschenk, Jorg; Kuhl, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for producing coils of spring steel material characterised by a material unwinding station an, intermittently operating cutting station a winding, spindle driven by a motor, which spindle on its peripheral surface comprises a material gripping device and by a conveyor arm reciprocating in a linear manner between the cutting station and the winding spindle which conveyor arm is provided with a material gripping device.
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 February 5, 1991 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 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.