Forming temporary airborne images
CA 2389269 A1 · Owner: O'Dwyer, James Michael · Inventors: O'Dwyer, James Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A method of forming a temporary airborne image (12) including the steps of arranging a plurality of projectiles in each of one or more barrel assemblies (10) wherein said projectiles include image forming matter; firing a predetermined number of the plurality of projectiles from selected barrel assemblies (10); and deploying the image forming matter to form a temporary airborne image.
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.
Why it's free to use
- Filed November 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2022.
- 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.