Tub with inflatable seal door
CA 2071433 C · Owner: Bloemer, John M. · Inventors: Swart, Peter W.; Jorsch, Thomas C.; August, Anthony M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For a tub which provides access through a side door an, inflatable seal is employed with the fluid connection to the seal being provided through the door hinge structure. In one embodiment, sensors are provided in conjunction with the water level in the tub so as to activate the source of pressurized fluid to the seal as well as to deflate the seal at a desired time. In another embodiment a latching, mechanism is utilized so as to provide a secure but easy delatching of the door.
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 June 17, 1992 and granted October 18, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 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.
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.