Coating material of armature coil in motor for electrical equipment
CA 2096500 C · Owner: Mitsuba Corporation · Inventors: Onodera, Tsugio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a motor in which a copper armature coil wound around an iron armature core is fixed to the armature core by coating a resin coating material on the armature coil by impregnation, crack generation in the coating material is prevented. The coefficient of thermal expansion of the coating material is set to a value between the coefficient of thermal expansion of copper and that of iron.
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, 1993 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2015.
- 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.