Expired Canadian patentCanada
Hood door airfoil
CA 2248500 C · Owner: Pfizer Limited · Inventors: Coe, Jotham Wadsworth; Brannegan, Daniel Patrick
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for directing the flow of air in a laboratory-type hood. A laboratory hood is provided with a closure sash and the lower edge of the closure sash has an airfoil that extends into the laboratory hood work space.
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 September 24, 1998 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 24, 1998
GrantedDecember 31, 2002
Term endedSeptember 24, 2018
Patent numberCA 2248500 C
Classification (IPC)B08B15/02
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.