Double entrance for use in an inflatable enclosure
CA 2425239 A1 · Owner: Hec Plastics Manufacturing Corporation (Qingdao) Ltd. · Inventors: Ostroskie, Sylvia; Murphy, John Kenneth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inflatable enclosure comprising:, .cndot. at least one inflating means for inflating said inflatable enclosure; .cndot. at least one entrance/exit means for entering and exiting said inflatable, enclosure;, .cndot. at least one air pressure regulator for maintaining the air pressure in said, enclosure when said at least one entrance/exit means is in use .cndot. at least one inflatable rigidifying means; .cndot. wherein at least one of said entrance/exit means and air pressure regulator is air actuated.
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 April 11, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2025.
- 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.