Seismic drill hole surface plug
CA 1048405 A · Owner: Bassani, Peppino · Inventors: Bassani, Peppino
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a means for use in plugging a well including a flexible plug member having a series of alternating long and short fingers radiating outwards from a central area the, fingers having projections for engaging with the wall of the well and together forming a cup-shaped plug to hold concrete poured into the mouth of the well to provide a plug.
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
- Granted February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 1996.
- 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.