Boiler tube cutting apparatus
CA 2017095 C · Owner: Hillestad, Mark W. · Inventors: Hillestad, Mark W.; Hillestad, Tollief O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for cutting boiler tubes comprising a movable carriage having a cutting means where the carriage and cutting means are supported on a lateral supporting beam secured adjacently to a bank of boiler tubes. The movable carriage means is stabilized with a plurality of bearings means for engaging the lateral beam and preventing strain and vibrations during the cutting process. The cutting means is preferably powered by a pneumatic motor.
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 May 18, 1990 and granted September 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2012.
- 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.