Elliptical diffuser drape
CA 1070584 A · Owner: Her Majesty The Queen, In Right Of Canada, As Represented By The Minister Of National Defence · Inventors: Criddle, Ernest E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A diffuser drape for use in surgical procedures includes a sheet with an elliptical aperture therein for placing over the patient with the aperture defining the area of the proposed surgical incision; an annular, elliptical air duct on and attached to the sheet surrounding the aperture, the air duct including a diffuser ring on its lower, inner side surrounding the aperture when in use for diffusing clean air radially outwardly into the area above the aperture to keep the area of the incision clean the ring having a non-uniform elliptical configuration i.e. the, ends of the diffuser ring are narrower than the sides thereof; and an air inlet integral with the air duct at each end thereof for …
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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 January 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 1997.
- 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.