Surgical drainage apparatus
CA 1292399 C · Owner: Sherwood Services Ag · Inventors: Kerwin, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thoracic drainage unit has a liquid seal chamber (16) above the collection container(14). The seal chamber(16) has an overflow outlet tube(72) and an inlet tube (92) spaced from the inner wall of the seal chamber(16). Baffle walls(96,98) define an enclosed space through which the inlet tube (92) may be observed for bubbling and tidalling. Further baffle walls (84,86,88,90) separate foam from the liquid around the overflow tube(72).
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
- Granted November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- 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.