Expired Canadian patentCanada
Ozone-friendly correction fluid
CA 2133829 C · Owner: Hulse, Vliet M. · Inventors: Ng, Kim H.; Decker, Thomas G.; Hulse, Vliet M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ozone-friendly correction fluid includes a non-halogenated solvent a butyl methacrylate copolymer as the polymeric film-forming material, a plasticizer, and an opacifying agent.
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 16, 1993 and granted August 12, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 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.
FiledMarch 16, 1993
GrantedAugust 12, 1997
Term endedMarch 16, 2013
Patent numberCA 2133829 C
Classification (IPC)C09D10/00 +1 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.