Pre-cast manhole basin and method and apparatus for connecting a pipe thereto
CA 2204716 A1 · Owner: Suatac, Ismail Cemil · Inventors: Suatac, Ismail Cemil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for connecting the a precast manhole base section to at least one pipe, in which the base section has a sidewall opening. The base section is positioned in a trench, and a connector has its inner end portion fitted into the opening. The pipe is connected to the outer end of the connector and is axially aligned with the connector by adjustment of the position of the connector in the opening the opening having a clearance space around the connector. Collars are fitted around the connector and are clamped against the inside and outside of the sidewall around the opening, and inner rims of the collars are sealed around the connector so that the collars define an annular chamber between …
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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
- Filed May 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2019.
- 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.