Pumps
CA 2092913 A1 · Owner: Componenta International Limited · Inventors: Booth, Raymond I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pump (10) comprises a hollow cylindrical body (12) open at one end. A central hole (14) is provided through the closed end of the body (12) with a perimeter wall (16) around the hole (14) of the same height as the boundary wall (18) of the body (12). A left hand thread (22) is provided around the wall (16) and a right hand thread (24) is provided on the inside face of the wall (18). First and second components (26 38) are provided rotatably mounted, respectively on the threads (24 and 22). The components (26 38), comprise a planar base (28, 40) with upstanding blades (36 42) , thereon. The blades (36) on the first component (26) are orientated for pumping when the rotor turns in one …
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 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2013.
- 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.