Improved grinding wheel for flat glass beveling
CA 2213845 C · Owner: Norton Company · Inventors: Buljan, Sergej-Tomislav; Williston, William H.; Ramanath, Srinivasan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite, polymer bonded abrasive wheel is disclosed for grinding operations and especially for use with multiple station glass, beveling machines. The abrasive wheel breaks in quickly and delivers consistent performance with little or no dressing needed over the entire life of the wheel. In one aspect the novel abrasive wheel includes a concentrically mounted annular abrasive rim on a cup shaped, hub. The rim can contain an abrasive such as diamond or cubic boron nitride which is embedded in a bonding composition that includes amino aldheyde and phenolic thermoset polymers a plasticizer, and optionally filler. The hub includes a crosslinkable strong and rigid, engineering polymer, …
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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 21, 1996 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2018.
- 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.