Bismaleimide-triazine resin bonded superabrasive wheels
CA 2081987 C · Owner: Ika, Prasad V. · Inventors: Ika, Prasad V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved superabrasive composition for grinding applications comprising a superabrasive material, a bismaleimide-triazine addition copolymer resin which as a cured polymer exhibits (i) a glass transition temperature (Tg) of at least about 280°C. and (ii) a long term thermal resistance of at least about 180°C. a free radical generating initiator and preferably, a catalyst, is disclosed. The superabrasive abrasive composition is particularly useful as a cutting edge in a high performance cutting wheel.
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 November 3, 1992 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2014.
- 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.