Apparatus and method for down hole fusing
CA 2205348 C · Owner: Meyers, Kurt S. · Inventors: Reber, Cleve C.; Meyers, Kurt S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to an apparatus and method for making service connections to polyolefin pipes (10). Specifically the apparatus , comprises a base (40) which seats on a polyolefin pipe (10) underground and has rods (44) which extend to the surface of the ground; a heating element (11) hinged to the base (40); a stack holder (60) which holds the stack (16) to be fused to the polyolefin pipe (10); and rods (14) for raising and lowering the heating element (11) from the surface of the ground. Specifically, the method involves the steps of (1) locating the service; (2) excavating an opening less than two feet in diameter from the surface to the polyolefin pipe (10) at …
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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 November 14, 1994 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2016.
- 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.