Expired Canadian patentCanada
Waterproof paper-backed coated abrasives
CA 2255075 C · Owner: Gaeta, Anthony C. · Inventors: Swei, Gwo Shin; Gaeta, Anthony C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Waterproof coated abrasive paper made using a maker and/or size coat comprising a radiation-curable binder that is hydrophobic when polymerized.
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 19, 1997 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 19, 1997
GrantedMarch 26, 2002
Term endedMay 19, 2017
Patent numberCA 2255075 C
Classification (IPC)B24D3/34 +2 more
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.