Apparatus and method for controlled delivery of a gas
CA 2399245 A1 · Owner: Hamilton, Richard · Inventors: Warner, John; Hamilton, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are apparatus (10) for delivery of a gas e.g. carbon dioxide , and/or chlorine dioxide and methods of its use and manufacture. The apparatus (10) includes an envelope (20), and a sachet (30) within the envelope that contains reactant (40), which generates a gas in the presence of an initiating agent, e.g. water. In another embodiment the apparatus includes a barrier , layer a sachet layer disposed adjacent to the barrier layer a reactant , disposed between the barrier layer and the sachet layer that generates a gas in the presence of an initiating agent and an envelope layer disposed , adjacent to the sachet layer.
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 February 16, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 16, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2023.
- 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.