Split abrasive roll attachment system
CA 2129984 A1 · Owner: Nakayama, Masashi · Inventors: Nagafuchi, Naohiro; Fukase, Yoshihiro; Nakayama, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A split abrasive roll is provided including cooperative engaging, members (3) disposed on both the rotatable shaft (2) of an abrasive machine and the inner surface of the roll member. The cooperative engaging members affix the center portion of the split abrasive roll to the shaft, while preserving a uniform abrasive outer surface. The respective ends (3b) of each of the roll members are also retained, and the split abrasive roll so provided tends to overcome the deficiencies in the split abrasive rolls of the prior art.
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 5, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.