Drain cleaning apparatus
CA 2179092 C · Owner: Gallagher, Michael P. · Inventors: Thisdell, Jay R.; Gallagher, Michael P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Drain Cleaning Apparatus for rotating a drain cleaning snake which is manually advanced through the apparatus comprises a frame and housing assembly supporting an axially displaceable non-rotating clutch actuating shaft which in turn supports a first annular clutch actuator for rotation relative thereto and axial displacement therewith. A second annular clutch actuator is coaxial with the first actuator and axially spaced therefrom and is supported in the housing for rotation relative thereto. A radially expandable and contractible clutch is axially captured between the two clutch actuators and, in response to displacement of the first clutch actuator toward the second, the clutch is …
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 June 13, 1996 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2018.
- 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.