Mobile ballast plow
CA 2038362 C · Owner: Theurer, Josef · Inventors: Theurer, Josef; Worgotter, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mobile ballast regulator comprises a machine frame supported by two undercarriages for mobility on the track in an operating direction, a ballast plow carrier frame arranged below the machine frame between the undercarriages and extending in the longitudinal direction the carrier frame, having one end linked to the machine frame and an opposite end supported by an undercarriage for mobility on the track and, a ballast plow vertically adjustably mounted on the carrier frame.
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 March 15, 1991 and granted January 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 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.