Expired Canadian patentCanada
Ozone-friendly correction fluid
CA 2089064 C · Owner: The Gillette Company · Inventors: Ng, Kim H.; Yau, Chiou C.; Sanborn, Norman G.
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 solvent which is non-halogenated a polymeric film-forming material such as a vinyl toluene-butadiene copolymer, a dispersing agent 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 May 28, 1992 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2014.
- 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 28, 1992
GrantedApril 6, 1999
Term endedMay 28, 2012
Patent numberCA 2089064 C
Classification (IPC)C09D10/00
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.