Chimney lining slip form
CA 1292367 C · Owner: Wosje, Michael T. · Inventors: Wosje, Michael T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chimney lining slip form is disclosed and comprises, an apparatus for lining pipes with cementitious material. A longitudinally split hollow circular body having a conical leading cone and an inwardly tapered trailing edge is provided with means connecting the portions of the body cone and trailing, edge along their longitudinal split into a unitary structure. A movable cap member is positioned over the said conically shaped leading cone with means yieldably spacing said cap member from said cone along a longitudinal line. A vibrator carried within said body for distributing the cementitious material about the apparatus as the material is poured over the cap and actuating, means carried …
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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
- Granted November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- 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.