Tracheal tube
CA 1065727 A · Owner: Ring, Wallace H. · Inventors: Elwyn, Richard A.; Ring, Wallace H.; Adair, John C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tracheal tube that may be constructed for either oral or nasal use is preformed as a flexible integral unit from flexible material having a memory so as to return to preformed shape following flexure. The tube has a proximal or machine end portion and a distal or patient end portion interconnected along the length of the tube by an intermediate portion and an abrupt bend portion. The distal or patient end portion and the adjoining intermediate portion merge into each other along the length of the tube and include curvature such that they will positionally conform to the shape of a patient's posterior pharynx and trachea and extend therealong when the tracheal tube is installed for use. …
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 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 1996.
- 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.