Universal abrasive sheet
CA 2417488 C · Owner: Holland, Matthew J. · Inventors: Shermer, Jason C.; Holland, Matthew J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A universal abrasive sheet is provided for a sanding or polishing machine and includes segments defined by weakened regions that allow portions of the universal abrasive sheet to be removed in order to adapt the abrasive sheet to alternative platent configurations. Each of the different configurations of the universal abrasive sheet can be provided with an individualized tip portion which can be separated from a body portion and either repositioned or replaced in order to change the working point of the tip portion when it becomes worn out.
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 January 28, 2003 and granted September 27, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2025.
- 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.