Method of cleaning drains utilizing foaming composition
CA 2198353 C · Owner: Steer, Frank J. · Inventors: Gipp, Mark M.; Steer, Frank J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of substantially removing an organic restriction from a drain pipe by introducing to a drain a cleaning composition which when activated with , water, contacts substantially all the interior surfaces of the pipe to be treated and improves the flow rate of the pipe by at least about 0.7 liters/min. over a 16 hour period. This method is effective for both clogged and slow-running drains.
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 February 23, 1996 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 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.