Pipe seal
CA 2131092 C · Owner: Marotta, Ronald G. · Inventors: Marotta, Ronald G.; Goad, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for covering an opening in a pipe and sealing a gas or fluid leak includes first (92) and second (82) pipe engaging blocks coupled to a frame (12). With the second block (82) fixedly mounted to the frame (12) and the first block (92) movable along the frame by means of a hydraulic cylinder (74) coupled thereto the first block (92) is positioned over and seals the leak under the force of hydraulic pressure. The frame (12) includes first (14) and second (16) mounting arrangements for attaching an articulated boom (42) such as a backhoe (40). The position of the second block (82) along the length of the frame (12) is adjustable. A guide rod (84) couples the movable first block (92) …
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 December 3, 1992 and granted February 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2014.
- 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.