Ozone-friendly correction fluid with improved overwrite characteristic
CA 2211356 C · Owner: The Gillette Company · Inventors: Yau, Chiou
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Generally, the invention relates to an ozone-friendly correction fluid that has improved writeover characteristics. The ozone-friendly correction fluids thus have a key benefit (good writeover characteristic) associated with halogenated hydrocarbon solvent-based correction fluids but also have the environmental benefits associated with ozone-friendly solvent-based correction fluids. Specifically the present invention relates to an ozone-friendly correction fluid comprising a non-halogenated hydrocarbon solvent a polymeric phase and an opacifying phase wherein the radio of opacifying phase to polymeric phase is from about 2.2 to about 3.8 preferably from about 2.4 to about 3.6 (based on …
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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 26, 1996 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 2018.
- 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.